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Finding the Fourth Proportional to 657,641.20, 986,461.80 and 445,064.80

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Solution

The fourth proportional to 657,641.20, 986,461.80 and 445,064.80 is: 667,597.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,641.20 : 986,461.80 = 445,064.80 : x
  2. Step 2: Convert to fraction form
    657,641.20/986,461.80 = 445,064.80/x
  3. Step 3: Cross multiply
    657,641.20x = 986,461.80 × 445,064.80
  4. Step 4: Simplify right side
    657,641.20x = 439,039,423,724.64
  5. Step 5: Solve for x
    x = 439,039,423,724.64/657,641.20
  6. Step 6: Final answer
    x = 667,597.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.