Home / 1,587.18-2,380.41-561.18

Finding the Fourth Proportional to 1,587.18, 2,380.41 and 561.18

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Solution

The fourth proportional to 1,587.18, 2,380.41 and 561.18 is: 841.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.18 : 2,380.41 = 561.18 : x
  2. Step 2: Convert to fraction form
    1,587.18/2,380.41 = 561.18/x
  3. Step 3: Cross multiply
    1,587.18x = 2,380.41 × 561.18
  4. Step 4: Simplify right side
    1,587.18x = 1,335,838.48
  5. Step 5: Solve for x
    x = 1,335,838.48/1,587.18
  6. Step 6: Final answer
    x = 841.64

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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.