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Finding the Fourth Proportional to 643,810.65, 888,425.49 and 382,176.93

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Solution

The fourth proportional to 643,810.65, 888,425.49 and 382,176.93 is: 527,384.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,810.65 : 888,425.49 = 382,176.93 : x
  2. Step 2: Convert to fraction form
    643,810.65/888,425.49 = 382,176.93/x
  3. Step 3: Cross multiply
    643,810.65x = 888,425.49 × 382,176.93
  4. Step 4: Simplify right side
    643,810.65x = 339,535,726,301.95
  5. Step 5: Solve for x
    x = 339,535,726,301.95/643,810.65
  6. Step 6: Final answer
    x = 527,384.45

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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.