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Finding the Fourth Proportional to 312,411.12, 431,126.73 and 169,170.72

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Solution

The fourth proportional to 312,411.12, 431,126.73 and 169,170.72 is: 233,455.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,411.12 : 431,126.73 = 169,170.72 : x
  2. Step 2: Convert to fraction form
    312,411.12/431,126.73 = 169,170.72/x
  3. Step 3: Cross multiply
    312,411.12x = 431,126.73 × 169,170.72
  4. Step 4: Simplify right side
    312,411.12x = 72,934,019,325.35
  5. Step 5: Solve for x
    x = 72,934,019,325.35/312,411.12
  6. Step 6: Final answer
    x = 233,455.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.