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Finding the Fourth Proportional to 312,238.80, 430,888.32 and 169,001.28

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Solution

The fourth proportional to 312,238.80, 430,888.32 and 169,001.28 is: 233,221.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,238.80 : 430,888.32 = 169,001.28 : x
  2. Step 2: Convert to fraction form
    312,238.80/430,888.32 = 169,001.28/x
  3. Step 3: Cross multiply
    312,238.80x = 430,888.32 × 169,001.28
  4. Step 4: Simplify right side
    312,238.80x = 72,820,677,617.05
  5. Step 5: Solve for x
    x = 72,820,677,617.05/312,238.80
  6. Step 6: Final answer
    x = 233,221.10

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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.