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Finding the Fourth Proportional to 643,545.30, 888,092.82 and 357,065.76

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Solution

The fourth proportional to 643,545.30, 888,092.82 and 357,065.76 is: 492,750.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,545.30 : 888,092.82 = 357,065.76 : x
  2. Step 2: Convert to fraction form
    643,545.30/888,092.82 = 357,065.76/x
  3. Step 3: Cross multiply
    643,545.30x = 888,092.82 × 357,065.76
  4. Step 4: Simplify right side
    643,545.30x = 317,107,537,723.84
  5. Step 5: Solve for x
    x = 317,107,537,723.84/643,545.30
  6. Step 6: Final answer
    x = 492,750.92

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1.5x scale

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.