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Finding the Fourth Proportional to 1,560.86, 2,154.21 and 963.45

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Solution

The fourth proportional to 1,560.86, 2,154.21 and 963.45 is: 1,329.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.86 : 2,154.21 = 963.45 : x
  2. Step 2: Convert to fraction form
    1,560.86/2,154.21 = 963.45/x
  3. Step 3: Cross multiply
    1,560.86x = 2,154.21 × 963.45
  4. Step 4: Simplify right side
    1,560.86x = 2,075,473.62
  5. Step 5: Solve for x
    x = 2,075,473.62/1,560.86
  6. Step 6: Final answer
    x = 1,329.70

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1.5x scale

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.