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Finding the Fourth Proportional to 486,148.70, 728,603.40 and 272,916.20

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Solution

The fourth proportional to 486,148.70, 728,603.40 and 272,916.20 is: 409,026.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,148.70 : 728,603.40 = 272,916.20 : x
  2. Step 2: Convert to fraction form
    486,148.70/728,603.40 = 272,916.20/x
  3. Step 3: Cross multiply
    486,148.70x = 728,603.40 × 272,916.20
  4. Step 4: Simplify right side
    486,148.70x = 198,847,671,235.08
  5. Step 5: Solve for x
    x = 198,847,671,235.08/486,148.70
  6. Step 6: Final answer
    x = 409,026.44

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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.