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Finding the Fourth Proportional to 819,478.80, 1,130,478.72 and 547,613.44

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Solution

The fourth proportional to 819,478.80, 1,130,478.72 and 547,613.44 is: 755,437.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,478.80 : 1,130,478.72 = 547,613.44 : x
  2. Step 2: Convert to fraction form
    819,478.80/1,130,478.72 = 547,613.44/x
  3. Step 3: Cross multiply
    819,478.80x = 1,130,478.72 × 547,613.44
  4. Step 4: Simplify right side
    819,478.80x = 619,065,340,706.00
  5. Step 5: Solve for x
    x = 619,065,340,706.00/819,478.80
  6. Step 6: Final answer
    x = 755,437.90

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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.