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Finding the Fourth Proportional to 513,567.61, 708,722.76 and 287,213.11

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Solution

The fourth proportional to 513,567.61, 708,722.76 and 287,213.11 is: 396,353.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,567.61 : 708,722.76 = 287,213.11 : x
  2. Step 2: Convert to fraction form
    513,567.61/708,722.76 = 287,213.11/x
  3. Step 3: Cross multiply
    513,567.61x = 708,722.76 × 287,213.11
  4. Step 4: Simplify right side
    513,567.61x = 203,554,467,332.63
  5. Step 5: Solve for x
    x = 203,554,467,332.63/513,567.61
  6. Step 6: Final answer
    x = 396,353.79

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.