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Finding the Fourth Proportional to 289,170.72, 399,034.08 and 168,312.96

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Solution

The fourth proportional to 289,170.72, 399,034.08 and 168,312.96 is: 232,259.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,170.72 : 399,034.08 = 168,312.96 : x
  2. Step 2: Convert to fraction form
    289,170.72/399,034.08 = 168,312.96/x
  3. Step 3: Cross multiply
    289,170.72x = 399,034.08 × 168,312.96
  4. Step 4: Simplify right side
    289,170.72x = 67,162,607,145.68
  5. Step 5: Solve for x
    x = 67,162,607,145.68/289,170.72
  6. Step 6: Final answer
    x = 232,259.36

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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.