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Finding the Fourth Proportional to 338,472.10, 507,902.55 and 128,260.90

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Solution

The fourth proportional to 338,472.10, 507,902.55 and 128,260.90 is: 192,465.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,472.10 : 507,902.55 = 128,260.90 : x
  2. Step 2: Convert to fraction form
    338,472.10/507,902.55 = 128,260.90/x
  3. Step 3: Cross multiply
    338,472.10x = 507,902.55 × 128,260.90
  4. Step 4: Simplify right side
    338,472.10x = 65,144,038,175.30
  5. Step 5: Solve for x
    x = 65,144,038,175.30/338,472.10
  6. Step 6: Final answer
    x = 192,465.02

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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.