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Finding the Fourth Proportional to 266,130.40, 398,612.40 and 231,138.40

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Solution

The fourth proportional to 266,130.40, 398,612.40 and 231,138.40 is: 346,201.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,130.40 : 398,612.40 = 231,138.40 : x
  2. Step 2: Convert to fraction form
    266,130.40/398,612.40 = 231,138.40/x
  3. Step 3: Cross multiply
    266,130.40x = 398,612.40 × 231,138.40
  4. Step 4: Simplify right side
    266,130.40x = 92,134,632,356.16
  5. Step 5: Solve for x
    x = 92,134,632,356.16/266,130.40
  6. Step 6: Final answer
    x = 346,201.08

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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.