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Finding the Fourth Proportional to 403,437.70, 605,156.55 and 261,720.10

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Solution

The fourth proportional to 403,437.70, 605,156.55 and 261,720.10 is: 392,580.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,437.70 : 605,156.55 = 261,720.10 : x
  2. Step 2: Convert to fraction form
    403,437.70/605,156.55 = 261,720.10/x
  3. Step 3: Cross multiply
    403,437.70x = 605,156.55 × 261,720.10
  4. Step 4: Simplify right side
    403,437.70x = 158,381,632,781.66
  5. Step 5: Solve for x
    x = 158,381,632,781.66/403,437.70
  6. Step 6: Final answer
    x = 392,580.15

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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.