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Finding the Fourth Proportional to 659,719.20, 989,002.80 and 448,672.80

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Solution

The fourth proportional to 659,719.20, 989,002.80 and 448,672.80 is: 672,617.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,719.20 : 989,002.80 = 448,672.80 : x
  2. Step 2: Convert to fraction form
    659,719.20/989,002.80 = 448,672.80/x
  3. Step 3: Cross multiply
    659,719.20x = 989,002.80 × 448,672.80
  4. Step 4: Simplify right side
    659,719.20x = 443,738,655,483.84
  5. Step 5: Solve for x
    x = 443,738,655,483.84/659,719.20
  6. Step 6: Final answer
    x = 672,617.46

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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.