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Finding the Fourth Proportional to 518,880.40, 778,320.60 and 413,904.40

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Solution

The fourth proportional to 518,880.40, 778,320.60 and 413,904.40 is: 620,856.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,880.40 : 778,320.60 = 413,904.40 : x
  2. Step 2: Convert to fraction form
    518,880.40/778,320.60 = 413,904.40/x
  3. Step 3: Cross multiply
    518,880.40x = 778,320.60 × 413,904.40
  4. Step 4: Simplify right side
    518,880.40x = 322,150,320,950.64
  5. Step 5: Solve for x
    x = 322,150,320,950.64/518,880.40
  6. Step 6: Final answer
    x = 620,856.60

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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.