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Finding the Fourth Proportional to 4,385.89, 6,579.90 and 1,307.89

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Solution

The fourth proportional to 4,385.89, 6,579.90 and 1,307.89 is: 1,962.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,385.89 : 6,579.90 = 1,307.89 : x
  2. Step 2: Convert to fraction form
    4,385.89/6,579.90 = 1,307.89/x
  3. Step 3: Cross multiply
    4,385.89x = 6,579.90 × 1,307.89
  4. Step 4: Simplify right side
    4,385.89x = 8,605,785.41
  5. Step 5: Solve for x
    x = 8,605,785.41/4,385.89
  6. Step 6: Final answer
    x = 1,962.15

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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.