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Finding the Fourth Proportional to 490,428, 731,350.26 and 485,943.72

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Solution

The fourth proportional to 490,428, 731,350.26 and 485,943.72 is: 724,663.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,428 : 731,350.26 = 485,943.72 : x
  2. Step 2: Convert to fraction form
    490,428/731,350.26 = 485,943.72/x
  3. Step 3: Cross multiply
    490,428x = 731,350.26 × 485,943.72
  4. Step 4: Simplify right side
    490,428x = 355,395,065,967.37
  5. Step 5: Solve for x
    x = 355,395,065,967.37/490,428
  6. Step 6: Final answer
    x = 724,663.08

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1.5x scale

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.