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Finding the Fourth Proportional to 488,155.61, 729,264.85 and 315,974.72

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Solution

The fourth proportional to 488,155.61, 729,264.85 and 315,974.72 is: 472,040.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,155.61 : 729,264.85 = 315,974.72 : x
  2. Step 2: Convert to fraction form
    488,155.61/729,264.85 = 315,974.72/x
  3. Step 3: Cross multiply
    488,155.61x = 729,264.85 × 315,974.72
  4. Step 4: Simplify right side
    488,155.61x = 230,429,259,595.18
  5. Step 5: Solve for x
    x = 230,429,259,595.18/488,155.61
  6. Step 6: Final answer
    x = 472,040.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.