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Finding the Fourth Proportional to 485,159.40, 669,065.87 and 383,427.91

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Solution

The fourth proportional to 485,159.40, 669,065.87 and 383,427.91 is: 528,771.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,159.40 : 669,065.87 = 383,427.91 : x
  2. Step 2: Convert to fraction form
    485,159.40/669,065.87 = 383,427.91/x
  3. Step 3: Cross multiply
    485,159.40x = 669,065.87 × 383,427.91
  4. Step 4: Simplify right side
    485,159.40x = 256,538,528,570.02
  5. Step 5: Solve for x
    x = 256,538,528,570.02/485,159.40
  6. Step 6: Final answer
    x = 528,771.63

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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.