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Finding the Fourth Proportional to 543,340.80, 749,865.60 and 316,972.80

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Solution

The fourth proportional to 543,340.80, 749,865.60 and 316,972.80 is: 437,454.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,340.80 : 749,865.60 = 316,972.80 : x
  2. Step 2: Convert to fraction form
    543,340.80/749,865.60 = 316,972.80/x
  3. Step 3: Cross multiply
    543,340.80x = 749,865.60 × 316,972.80
  4. Step 4: Simplify right side
    543,340.80x = 237,686,998,855.68
  5. Step 5: Solve for x
    x = 237,686,998,855.68/543,340.80
  6. Step 6: Final answer
    x = 437,454.72

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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.