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Finding the Fourth Proportional to 2,390.79, 3,587.11 and 1,158.11

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Solution

The fourth proportional to 2,390.79, 3,587.11 and 1,158.11 is: 1,737.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.79 : 3,587.11 = 1,158.11 : x
  2. Step 2: Convert to fraction form
    2,390.79/3,587.11 = 1,158.11/x
  3. Step 3: Cross multiply
    2,390.79x = 3,587.11 × 1,158.11
  4. Step 4: Simplify right side
    2,390.79x = 4,154,244.24
  5. Step 5: Solve for x
    x = 4,154,244.24/2,390.79
  6. Step 6: Final answer
    x = 1,737.60

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1.5x scale

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.