Home / 442,025,438.40-661,762,699.20-391,007,102.40

Finding the Fourth Proportional to 442,025,438.40, 661,762,699.20 and 391,007,102.40

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Solution

The fourth proportional to 442,025,438.40, 661,762,699.20 and 391,007,102.40 is: 585,382,407.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,025,438.40 : 661,762,699.20 = 391,007,102.40 : x
  2. Step 2: Convert to fraction form
    442,025,438.40/661,762,699.20 = 391,007,102.40/x
  3. Step 3: Cross multiply
    442,025,438.40x = 661,762,699.20 × 391,007,102.40
  4. Step 4: Simplify right side
    442,025,438.40x = 258,753,915,490,594,816
  5. Step 5: Solve for x
    x = 258,753,915,490,594,816/442,025,438.40
  6. Step 6: Final answer
    x = 585,382,407.92

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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.