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Finding the Fourth Proportional to 425,831.07, 638,854.01 and 141,523.11

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Solution

The fourth proportional to 425,831.07, 638,854.01 and 141,523.11 is: 212,320.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,831.07 : 638,854.01 = 141,523.11 : x
  2. Step 2: Convert to fraction form
    425,831.07/638,854.01 = 141,523.11/x
  3. Step 3: Cross multiply
    425,831.07x = 638,854.01 × 141,523.11
  4. Step 4: Simplify right side
    425,831.07x = 90,412,606,331.17
  5. Step 5: Solve for x
    x = 90,412,606,331.17/425,831.07
  6. Step 6: Final answer
    x = 212,320.36

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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.