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Finding the Fourth Proportional to 862,700.80, 1,293,079.20 and 413,636.80

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Solution

The fourth proportional to 862,700.80, 1,293,079.20 and 413,636.80 is: 619,989.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,700.80 : 1,293,079.20 = 413,636.80 : x
  2. Step 2: Convert to fraction form
    862,700.80/1,293,079.20 = 413,636.80/x
  3. Step 3: Cross multiply
    862,700.80x = 1,293,079.20 × 413,636.80
  4. Step 4: Simplify right side
    862,700.80x = 534,865,142,434.56
  5. Step 5: Solve for x
    x = 534,865,142,434.56/862,700.80
  6. Step 6: Final answer
    x = 619,989.16

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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.