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Finding the Fourth Proportional to 659,213.88, 909,689.90 and 372,739.96

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Solution

The fourth proportional to 659,213.88, 909,689.90 and 372,739.96 is: 514,366.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,213.88 : 909,689.90 = 372,739.96 : x
  2. Step 2: Convert to fraction form
    659,213.88/909,689.90 = 372,739.96/x
  3. Step 3: Cross multiply
    659,213.88x = 909,689.90 × 372,739.96
  4. Step 4: Simplify right side
    659,213.88x = 339,077,776,938.40
  5. Step 5: Solve for x
    x = 339,077,776,938.40/659,213.88
  6. Step 6: Final answer
    x = 514,366.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.