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Finding the Fourth Proportional to 710,151.64, 979,994.08 and 387,863

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Solution

The fourth proportional to 710,151.64, 979,994.08 and 387,863 is: 535,242.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,151.64 : 979,994.08 = 387,863 : x
  2. Step 2: Convert to fraction form
    710,151.64/979,994.08 = 387,863/x
  3. Step 3: Cross multiply
    710,151.64x = 979,994.08 × 387,863
  4. Step 4: Simplify right side
    710,151.64x = 380,103,443,851.04
  5. Step 5: Solve for x
    x = 380,103,443,851.04/710,151.64
  6. Step 6: Final answer
    x = 535,242.65

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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.