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Finding the Fourth Proportional to 710,148.75, 979,990.11 and 387,860.14

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Solution

The fourth proportional to 710,148.75, 979,990.11 and 387,860.14 is: 535,238.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,148.75 : 979,990.11 = 387,860.14 : x
  2. Step 2: Convert to fraction form
    710,148.75/979,990.11 = 387,860.14/x
  3. Step 3: Cross multiply
    710,148.75x = 979,990.11 × 387,860.14
  4. Step 4: Simplify right side
    710,148.75x = 380,099,102,488.20
  5. Step 5: Solve for x
    x = 380,099,102,488.20/710,148.75
  6. Step 6: Final answer
    x = 535,238.72

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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.