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Finding the Fourth Proportional to 710,178.06, 980,067.15 and 387,905.52

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Solution

The fourth proportional to 710,178.06, 980,067.15 and 387,905.52 is: 535,321.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,178.06 : 980,067.15 = 387,905.52 : x
  2. Step 2: Convert to fraction form
    710,178.06/980,067.15 = 387,905.52/x
  3. Step 3: Cross multiply
    710,178.06x = 980,067.15 × 387,905.52
  4. Step 4: Simplify right side
    710,178.06x = 380,173,457,455.67
  5. Step 5: Solve for x
    x = 380,173,457,455.67/710,178.06
  6. Step 6: Final answer
    x = 535,321.32

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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.