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Finding the Fourth Proportional to 660,398.40, 911,008.80 and 418,273.60

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Solution

The fourth proportional to 660,398.40, 911,008.80 and 418,273.60 is: 577,001.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,398.40 : 911,008.80 = 418,273.60 : x
  2. Step 2: Convert to fraction form
    660,398.40/911,008.80 = 418,273.60/x
  3. Step 3: Cross multiply
    660,398.40x = 911,008.80 × 418,273.60
  4. Step 4: Simplify right side
    660,398.40x = 381,050,930,407.68
  5. Step 5: Solve for x
    x = 381,050,930,407.68/660,398.40
  6. Step 6: Final answer
    x = 577,001.60

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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.