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Finding the Fourth Proportional to 709,766.65, 979,492.80 and 387,490.33

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Solution

The fourth proportional to 709,766.65, 979,492.80 and 387,490.33 is: 534,744.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,766.65 : 979,492.80 = 387,490.33 : x
  2. Step 2: Convert to fraction form
    709,766.65/979,492.80 = 387,490.33/x
  3. Step 3: Cross multiply
    709,766.65x = 979,492.80 × 387,490.33
  4. Step 4: Simplify right side
    709,766.65x = 379,543,988,304.62
  5. Step 5: Solve for x
    x = 379,543,988,304.62/709,766.65
  6. Step 6: Final answer
    x = 534,744.75

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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.