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Finding the Fourth Proportional to 718,261.47, 991,290.56 and 412,433.55

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Solution

The fourth proportional to 718,261.47, 991,290.56 and 412,433.55 is: 569,209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,261.47 : 991,290.56 = 412,433.55 : x
  2. Step 2: Convert to fraction form
    718,261.47/991,290.56 = 412,433.55/x
  3. Step 3: Cross multiply
    718,261.47x = 991,290.56 × 412,433.55
  4. Step 4: Simplify right side
    718,261.47x = 408,841,482,680.12
  5. Step 5: Solve for x
    x = 408,841,482,680.12/718,261.47
  6. Step 6: Final answer
    x = 569,209.82

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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.