Home / 312,487.40-431,113.70-231,011.30

Finding the Fourth Proportional to 312,487.40, 431,113.70 and 231,011.30

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Solution

The fourth proportional to 312,487.40, 431,113.70 and 231,011.30 is: 318,707.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,487.40 : 431,113.70 = 231,011.30 : x
  2. Step 2: Convert to fraction form
    312,487.40/431,113.70 = 231,011.30/x
  3. Step 3: Cross multiply
    312,487.40x = 431,113.70 × 231,011.30
  4. Step 4: Simplify right side
    312,487.40x = 99,592,132,974.19
  5. Step 5: Solve for x
    x = 99,592,132,974.19/312,487.40
  6. Step 6: Final answer
    x = 318,707.68

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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.