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Finding the Fourth Proportional to 720,000.85, 993,598.14 and 397,710.95

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Solution

The fourth proportional to 720,000.85, 993,598.14 and 397,710.95 is: 548,839.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,000.85 : 993,598.14 = 397,710.95 : x
  2. Step 2: Convert to fraction form
    720,000.85/993,598.14 = 397,710.95/x
  3. Step 3: Cross multiply
    720,000.85x = 993,598.14 × 397,710.95
  4. Step 4: Simplify right side
    720,000.85x = 395,164,863,655.91
  5. Step 5: Solve for x
    x = 395,164,863,655.91/720,000.85
  6. Step 6: Final answer
    x = 548,839.44

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Similar ratio
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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.