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Finding the Fourth Proportional to 488,128.80, 732,849.30 and 311,419.20

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Solution

The fourth proportional to 488,128.80, 732,849.30 and 311,419.20 is: 467,547.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,128.80 : 732,849.30 = 311,419.20 : x
  2. Step 2: Convert to fraction form
    488,128.80/732,849.30 = 311,419.20/x
  3. Step 3: Cross multiply
    488,128.80x = 732,849.30 × 311,419.20
  4. Step 4: Simplify right side
    488,128.80x = 228,223,342,726.56
  5. Step 5: Solve for x
    x = 228,223,342,726.56/488,128.80
  6. Step 6: Final answer
    x = 467,547.38

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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.