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Finding the Fourth Proportional to 518,904.20, 778,356.30 and 518,904.20

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Solution

The fourth proportional to 518,904.20, 778,356.30 and 518,904.20 is: 778,356.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,904.20 : 778,356.30 = 518,904.20 : x
  2. Step 2: Convert to fraction form
    518,904.20/778,356.30 = 518,904.20/x
  3. Step 3: Cross multiply
    518,904.20x = 778,356.30 × 518,904.20
  4. Step 4: Simplify right side
    518,904.20x = 403,892,353,166.46
  5. Step 5: Solve for x
    x = 403,892,353,166.46/518,904.20
  6. Step 6: Final answer
    x = 778,356.30

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.