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Finding the Fourth Proportional to 261,389.93, 391,453.38 and 148,728.89

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Solution

The fourth proportional to 261,389.93, 391,453.38 and 148,728.89 is: 222,734.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,389.93 : 391,453.38 = 148,728.89 : x
  2. Step 2: Convert to fraction form
    261,389.93/391,453.38 = 148,728.89/x
  3. Step 3: Cross multiply
    261,389.93x = 391,453.38 × 148,728.89
  4. Step 4: Simplify right side
    261,389.93x = 58,220,426,694.15
  5. Step 5: Solve for x
    x = 58,220,426,694.15/261,389.93
  6. Step 6: Final answer
    x = 222,734.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.