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Finding the Fourth Proportional to 709,912.08, 979,718.38 and 387,652.10

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Solution

The fourth proportional to 709,912.08, 979,718.38 and 387,652.10 is: 534,981.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,912.08 : 979,718.38 = 387,652.10 : x
  2. Step 2: Convert to fraction form
    709,912.08/979,718.38 = 387,652.10/x
  3. Step 3: Cross multiply
    709,912.08x = 979,718.38 × 387,652.10
  4. Step 4: Simplify right side
    709,912.08x = 379,789,887,415.60
  5. Step 5: Solve for x
    x = 379,789,887,415.60/709,912.08
  6. Step 6: Final answer
    x = 534,981.58

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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.