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Finding the Fourth Proportional to 710,070.81, 979,892.53 and 387,780.81

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Solution

The fourth proportional to 710,070.81, 979,892.53 and 387,780.81 is: 535,134.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,070.81 : 979,892.53 = 387,780.81 : x
  2. Step 2: Convert to fraction form
    710,070.81/979,892.53 = 387,780.81/x
  3. Step 3: Cross multiply
    710,070.81x = 979,892.53 × 387,780.81
  4. Step 4: Simplify right side
    710,070.81x = 379,983,518,996.35
  5. Step 5: Solve for x
    x = 379,983,518,996.35/710,070.81
  6. Step 6: Final answer
    x = 535,134.68

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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.