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Finding the Fourth Proportional to 904,099.80, 1,357,704.90 and 639,715.80

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Solution

The fourth proportional to 904,099.80, 1,357,704.90 and 639,715.80 is: 960,674.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    904,099.80 : 1,357,704.90 = 639,715.80 : x
  2. Step 2: Convert to fraction form
    904,099.80/1,357,704.90 = 639,715.80/x
  3. Step 3: Cross multiply
    904,099.80x = 1,357,704.90 × 639,715.80
  4. Step 4: Simplify right side
    904,099.80x = 868,545,276,267.42
  5. Step 5: Solve for x
    x = 868,545,276,267.42/904,099.80
  6. Step 6: Final answer
    x = 960,674.12

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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.