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Finding the Fourth Proportional to 521,567.40, 782,351.10 and 453,138.60

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Solution

The fourth proportional to 521,567.40, 782,351.10 and 453,138.60 is: 679,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,567.40 : 782,351.10 = 453,138.60 : x
  2. Step 2: Convert to fraction form
    521,567.40/782,351.10 = 453,138.60/x
  3. Step 3: Cross multiply
    521,567.40x = 782,351.10 × 453,138.60
  4. Step 4: Simplify right side
    521,567.40x = 354,513,482,162.46
  5. Step 5: Solve for x
    x = 354,513,482,162.46/521,567.40
  6. Step 6: Final answer
    x = 679,707.90

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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.