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Finding the Fourth Proportional to 709,950.30, 979,735.01 and 387,660.39

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Solution

The fourth proportional to 709,950.30, 979,735.01 and 387,660.39 is: 534,973.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,950.30 : 979,735.01 = 387,660.39 : x
  2. Step 2: Convert to fraction form
    709,950.30/979,735.01 = 387,660.39/x
  3. Step 3: Cross multiply
    709,950.30x = 979,735.01 × 387,660.39
  4. Step 4: Simplify right side
    709,950.30x = 379,804,454,134.95
  5. Step 5: Solve for x
    x = 379,804,454,134.95/709,950.30
  6. Step 6: Final answer
    x = 534,973.30

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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.