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Finding the Fourth Proportional to 521,567.20, 782,350.80 and 403,323.40

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Solution

The fourth proportional to 521,567.20, 782,350.80 and 403,323.40 is: 604,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,567.20 : 782,350.80 = 403,323.40 : x
  2. Step 2: Convert to fraction form
    521,567.20/782,350.80 = 403,323.40/x
  3. Step 3: Cross multiply
    521,567.20x = 782,350.80 × 403,323.40
  4. Step 4: Simplify right side
    521,567.20x = 315,540,384,648.72
  5. Step 5: Solve for x
    x = 315,540,384,648.72/521,567.20
  6. Step 6: Final answer
    x = 604,985.10

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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.