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Finding the Fourth Proportional to 1,140.64, 1,574.08 and 616.67

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Solution

The fourth proportional to 1,140.64, 1,574.08 and 616.67 is: 851.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.64 : 1,574.08 = 616.67 : x
  2. Step 2: Convert to fraction form
    1,140.64/1,574.08 = 616.67/x
  3. Step 3: Cross multiply
    1,140.64x = 1,574.08 × 616.67
  4. Step 4: Simplify right side
    1,140.64x = 970,676.96
  5. Step 5: Solve for x
    x = 970,676.96/1,140.64
  6. Step 6: Final answer
    x = 851.00

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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.