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Finding the Fourth Proportional to 647,140, 970,901.52 and 331,818.16

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Solution

The fourth proportional to 647,140, 970,901.52 and 331,818.16 is: 497,825.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,140 : 970,901.52 = 331,818.16 : x
  2. Step 2: Convert to fraction form
    647,140/970,901.52 = 331,818.16/x
  3. Step 3: Cross multiply
    647,140x = 970,901.52 × 331,818.16
  4. Step 4: Simplify right side
    647,140x = 322,162,755,907.60
  5. Step 5: Solve for x
    x = 322,162,755,907.60/647,140
  6. Step 6: Final answer
    x = 497,825.44

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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.