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Finding the Fourth Proportional to 1,560.55, 2,341.15 and 520.51

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Solution

The fourth proportional to 1,560.55, 2,341.15 and 520.51 is: 780.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.55 : 2,341.15 = 520.51 : x
  2. Step 2: Convert to fraction form
    1,560.55/2,341.15 = 520.51/x
  3. Step 3: Cross multiply
    1,560.55x = 2,341.15 × 520.51
  4. Step 4: Simplify right side
    1,560.55x = 1,218,580.28
  5. Step 5: Solve for x
    x = 1,218,580.28/1,560.55
  6. Step 6: Final answer
    x = 780.87

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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.