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Finding the Fourth Proportional to 487,002.90, 730,504.35 and 398,429.40

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Solution

The fourth proportional to 487,002.90, 730,504.35 and 398,429.40 is: 597,644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,002.90 : 730,504.35 = 398,429.40 : x
  2. Step 2: Convert to fraction form
    487,002.90/730,504.35 = 398,429.40/x
  3. Step 3: Cross multiply
    487,002.90x = 730,504.35 × 398,429.40
  4. Step 4: Simplify right side
    487,002.90x = 291,054,409,867.89
  5. Step 5: Solve for x
    x = 291,054,409,867.89/487,002.90
  6. Step 6: Final answer
    x = 597,644.10

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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.