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Finding the Fourth Proportional to 853,785.88, 1,178,269.86 and 491,264.80

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Solution

The fourth proportional to 853,785.88, 1,178,269.86 and 491,264.80 is: 677,971.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,785.88 : 1,178,269.86 = 491,264.80 : x
  2. Step 2: Convert to fraction form
    853,785.88/1,178,269.86 = 491,264.80/x
  3. Step 3: Cross multiply
    853,785.88x = 1,178,269.86 × 491,264.80
  4. Step 4: Simplify right side
    853,785.88x = 578,842,507,118.93
  5. Step 5: Solve for x
    x = 578,842,507,118.93/853,785.88
  6. Step 6: Final answer
    x = 677,971.52

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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.