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Finding the Fourth Proportional to 1,560, 2,152.65 and 887.79

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Solution

The fourth proportional to 1,560, 2,152.65 and 887.79 is: 1,225.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560 : 2,152.65 = 887.79 : x
  2. Step 2: Convert to fraction form
    1,560/2,152.65 = 887.79/x
  3. Step 3: Cross multiply
    1,560x = 2,152.65 × 887.79
  4. Step 4: Simplify right side
    1,560x = 1,911,101.14
  5. Step 5: Solve for x
    x = 1,911,101.14/1,560
  6. Step 6: Final answer
    x = 1,225.06

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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.