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Finding the Fourth Proportional to 230,438.57, 318,006.54 and 128,470.50

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Solution

The fourth proportional to 230,438.57, 318,006.54 and 128,470.50 is: 177,290.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,438.57 : 318,006.54 = 128,470.50 : x
  2. Step 2: Convert to fraction form
    230,438.57/318,006.54 = 128,470.50/x
  3. Step 3: Cross multiply
    230,438.57x = 318,006.54 × 128,470.50
  4. Step 4: Simplify right side
    230,438.57x = 40,854,459,197.07
  5. Step 5: Solve for x
    x = 40,854,459,197.07/230,438.57
  6. Step 6: Final answer
    x = 177,290.03

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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.