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Finding the Fourth Proportional to 1,567.84, 2,349.32 and 989.52

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Solution

The fourth proportional to 1,567.84, 2,349.32 and 989.52 is: 1,482.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,567.84 : 2,349.32 = 989.52 : x
  2. Step 2: Convert to fraction form
    1,567.84/2,349.32 = 989.52/x
  3. Step 3: Cross multiply
    1,567.84x = 2,349.32 × 989.52
  4. Step 4: Simplify right side
    1,567.84x = 2,324,699.13
  5. Step 5: Solve for x
    x = 2,324,699.13/1,567.84
  6. Step 6: Final answer
    x = 1,482.74

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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.