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Finding the Fourth Proportional to 660,053.40, 989,849.70 and 344,405.40

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Solution

The fourth proportional to 660,053.40, 989,849.70 and 344,405.40 is: 516,487.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,053.40 : 989,849.70 = 344,405.40 : x
  2. Step 2: Convert to fraction form
    660,053.40/989,849.70 = 344,405.40/x
  3. Step 3: Cross multiply
    660,053.40x = 989,849.70 × 344,405.40
  4. Step 4: Simplify right side
    660,053.40x = 340,909,581,868.38
  5. Step 5: Solve for x
    x = 340,909,581,868.38/660,053.40
  6. Step 6: Final answer
    x = 516,487.88

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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.