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Finding the Fourth Proportional to 453,140.40, 679,264.20 and 253,556.40

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Solution

The fourth proportional to 453,140.40, 679,264.20 and 253,556.40 is: 380,084.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,140.40 : 679,264.20 = 253,556.40 : x
  2. Step 2: Convert to fraction form
    453,140.40/679,264.20 = 253,556.40/x
  3. Step 3: Cross multiply
    453,140.40x = 679,264.20 × 253,556.40
  4. Step 4: Simplify right side
    453,140.40x = 172,231,785,200.88
  5. Step 5: Solve for x
    x = 172,231,785,200.88/453,140.40
  6. Step 6: Final answer
    x = 380,084.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.