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Finding the Fourth Proportional to 490,423, 731,342.81 and 485,938.76

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Solution

The fourth proportional to 490,423, 731,342.81 and 485,938.76 is: 724,655.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,423 : 731,342.81 = 485,938.76 : x
  2. Step 2: Convert to fraction form
    490,423/731,342.81 = 485,938.76/x
  3. Step 3: Cross multiply
    490,423x = 731,342.81 × 485,938.76
  4. Step 4: Simplify right side
    490,423x = 355,387,818,226.32
  5. Step 5: Solve for x
    x = 355,387,818,226.32/490,423
  6. Step 6: Final answer
    x = 724,655.69

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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.