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Finding the Fourth Proportional to 611,800.20, 917,700.30 and 442,963.80

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Solution

The fourth proportional to 611,800.20, 917,700.30 and 442,963.80 is: 664,445.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,800.20 : 917,700.30 = 442,963.80 : x
  2. Step 2: Convert to fraction form
    611,800.20/917,700.30 = 442,963.80/x
  3. Step 3: Cross multiply
    611,800.20x = 917,700.30 × 442,963.80
  4. Step 4: Simplify right side
    611,800.20x = 406,508,012,149.14
  5. Step 5: Solve for x
    x = 406,508,012,149.14/611,800.20
  6. Step 6: Final answer
    x = 664,445.70

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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.