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Finding the Fourth Proportional to 291,356.10, 402,071.31 and 170,520.39

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Solution

The fourth proportional to 291,356.10, 402,071.31 and 170,520.39 is: 235,318.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,356.10 : 402,071.31 = 170,520.39 : x
  2. Step 2: Convert to fraction form
    291,356.10/402,071.31 = 170,520.39/x
  3. Step 3: Cross multiply
    291,356.10x = 402,071.31 × 170,520.39
  4. Step 4: Simplify right side
    291,356.10x = 68,561,356,589.01
  5. Step 5: Solve for x
    x = 68,561,356,589.01/291,356.10
  6. Step 6: Final answer
    x = 235,318.07

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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.