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Finding the Fourth Proportional to 648,781.25, 895,343.42 and 358,407.79

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Solution

The fourth proportional to 648,781.25, 895,343.42 and 358,407.79 is: 494,616.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,781.25 : 895,343.42 = 358,407.79 : x
  2. Step 2: Convert to fraction form
    648,781.25/895,343.42 = 358,407.79/x
  3. Step 3: Cross multiply
    648,781.25x = 895,343.42 × 358,407.79
  4. Step 4: Simplify right side
    648,781.25x = 320,898,055,110.90
  5. Step 5: Solve for x
    x = 320,898,055,110.90/648,781.25
  6. Step 6: Final answer
    x = 494,616.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.