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Finding the Fourth Proportional to 518,905.20, 778,284.90 and 163,955.10

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Solution

The fourth proportional to 518,905.20, 778,284.90 and 163,955.10 is: 245,909.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,905.20 : 778,284.90 = 163,955.10 : x
  2. Step 2: Convert to fraction form
    518,905.20/778,284.90 = 163,955.10/x
  3. Step 3: Cross multiply
    518,905.20x = 778,284.90 × 163,955.10
  4. Step 4: Simplify right side
    518,905.20x = 127,603,778,607.99
  5. Step 5: Solve for x
    x = 127,603,778,607.99/518,905.20
  6. Step 6: Final answer
    x = 245,909.62

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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.