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Finding the Fourth Proportional to 431,170.10, 646,264.70 and 262,318.22

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Solution

The fourth proportional to 431,170.10, 646,264.70 and 262,318.22 is: 393,178.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,170.10 : 646,264.70 = 262,318.22 : x
  2. Step 2: Convert to fraction form
    431,170.10/646,264.70 = 262,318.22/x
  3. Step 3: Cross multiply
    431,170.10x = 646,264.70 × 262,318.22
  4. Step 4: Simplify right side
    431,170.10x = 169,527,001,209.92
  5. Step 5: Solve for x
    x = 169,527,001,209.92/431,170.10
  6. Step 6: Final answer
    x = 393,178.94

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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.