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Finding the Fourth Proportional to 853,717.90, 1,178,352 and 491,178.88

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Solution

The fourth proportional to 853,717.90, 1,178,352 and 491,178.88 is: 677,954.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,717.90 : 1,178,352 = 491,178.88 : x
  2. Step 2: Convert to fraction form
    853,717.90/1,178,352 = 491,178.88/x
  3. Step 3: Cross multiply
    853,717.90x = 1,178,352 × 491,178.88
  4. Step 4: Simplify right side
    853,717.90x = 578,781,615,605.76
  5. Step 5: Solve for x
    x = 578,781,615,605.76/853,717.90
  6. Step 6: Final answer
    x = 677,954.18

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1.5x scale

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.