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Finding the Fourth Proportional to 710,005.96, 979,816.28 and 387,719.92

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Solution

The fourth proportional to 710,005.96, 979,816.28 and 387,719.92 is: 535,057.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,005.96 : 979,816.28 = 387,719.92 : x
  2. Step 2: Convert to fraction form
    710,005.96/979,816.28 = 387,719.92/x
  3. Step 3: Cross multiply
    710,005.96x = 979,816.28 × 387,719.92
  4. Step 4: Simplify right side
    710,005.96x = 379,894,289,696.30
  5. Step 5: Solve for x
    x = 379,894,289,696.30/710,005.96
  6. Step 6: Final answer
    x = 535,057.89

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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.