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Finding the Fourth Proportional to 331,640.10, 497,460.15 and 121,428.90

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Solution

The fourth proportional to 331,640.10, 497,460.15 and 121,428.90 is: 182,143.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,640.10 : 497,460.15 = 121,428.90 : x
  2. Step 2: Convert to fraction form
    331,640.10/497,460.15 = 121,428.90/x
  3. Step 3: Cross multiply
    331,640.10x = 497,460.15 × 121,428.90
  4. Step 4: Simplify right side
    331,640.10x = 60,406,038,808.34
  5. Step 5: Solve for x
    x = 60,406,038,808.34/331,640.10
  6. Step 6: Final answer
    x = 182,143.35

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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.