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Finding the Fourth Proportional to 288,248.40, 431,206.20 and 253,256.40

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Solution

The fourth proportional to 288,248.40, 431,206.20 and 253,256.40 is: 378,859.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,248.40 : 431,206.20 = 253,256.40 : x
  2. Step 2: Convert to fraction form
    288,248.40/431,206.20 = 253,256.40/x
  3. Step 3: Cross multiply
    288,248.40x = 431,206.20 × 253,256.40
  4. Step 4: Simplify right side
    288,248.40x = 109,205,729,869.68
  5. Step 5: Solve for x
    x = 109,205,729,869.68/288,248.40
  6. Step 6: Final answer
    x = 378,859.80

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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.