Home / 490,428-731,350.26-485,943.78

Finding the Fourth Proportional to 490,428, 731,350.26 and 485,943.78

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Solution

The fourth proportional to 490,428, 731,350.26 and 485,943.78 is: 724,663.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,428 : 731,350.26 = 485,943.78 : x
  2. Step 2: Convert to fraction form
    490,428/731,350.26 = 485,943.78/x
  3. Step 3: Cross multiply
    490,428x = 731,350.26 × 485,943.78
  4. Step 4: Simplify right side
    490,428x = 355,395,109,848.38
  5. Step 5: Solve for x
    x = 355,395,109,848.38/490,428
  6. Step 6: Final answer
    x = 724,663.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.