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Finding the Fourth Proportional to 709,425.93, 979,028.54 and 387,156.70

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Solution

The fourth proportional to 709,425.93, 979,028.54 and 387,156.70 is: 534,287.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,425.93 : 979,028.54 = 387,156.70 : x
  2. Step 2: Convert to fraction form
    709,425.93/979,028.54 = 387,156.70/x
  3. Step 3: Cross multiply
    709,425.93x = 979,028.54 × 387,156.70
  4. Step 4: Simplify right side
    709,425.93x = 379,037,458,752.22
  5. Step 5: Solve for x
    x = 379,037,458,752.22/709,425.93
  6. Step 6: Final answer
    x = 534,287.57

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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.