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Finding the Fourth Proportional to 647,614.60, 971,421.90 and 529,419.40

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Solution

The fourth proportional to 647,614.60, 971,421.90 and 529,419.40 is: 794,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,614.60 : 971,421.90 = 529,419.40 : x
  2. Step 2: Convert to fraction form
    647,614.60/971,421.90 = 529,419.40/x
  3. Step 3: Cross multiply
    647,614.60x = 971,421.90 × 529,419.40
  4. Step 4: Simplify right side
    647,614.60x = 514,289,599,444.86
  5. Step 5: Solve for x
    x = 514,289,599,444.86/647,614.60
  6. Step 6: Final answer
    x = 794,129.10

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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.