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Finding the Fourth Proportional to 1,547.55, 2,321.62 and 1,392.63

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Solution

The fourth proportional to 1,547.55, 2,321.62 and 1,392.63 is: 2,089.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.55 : 2,321.62 = 1,392.63 : x
  2. Step 2: Convert to fraction form
    1,547.55/2,321.62 = 1,392.63/x
  3. Step 3: Cross multiply
    1,547.55x = 2,321.62 × 1,392.63
  4. Step 4: Simplify right side
    1,547.55x = 3,233,157.66
  5. Step 5: Solve for x
    x = 3,233,157.66/1,547.55
  6. Step 6: Final answer
    x = 2,089.22

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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.