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Finding the Fourth Proportional to 488,469.20, 732,703.80 and 429,420.20

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Solution

The fourth proportional to 488,469.20, 732,703.80 and 429,420.20 is: 644,130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,469.20 : 732,703.80 = 429,420.20 : x
  2. Step 2: Convert to fraction form
    488,469.20/732,703.80 = 429,420.20/x
  3. Step 3: Cross multiply
    488,469.20x = 732,703.80 × 429,420.20
  4. Step 4: Simplify right side
    488,469.20x = 314,637,812,336.76
  5. Step 5: Solve for x
    x = 314,637,812,336.76/488,469.20
  6. Step 6: Final answer
    x = 644,130.30

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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.