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Finding the Fourth Proportional to 1,140.37, 1,573.71 and 616.40

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Solution

The fourth proportional to 1,140.37, 1,573.71 and 616.40 is: 850.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.37 : 1,573.71 = 616.40 : x
  2. Step 2: Convert to fraction form
    1,140.37/1,573.71 = 616.40/x
  3. Step 3: Cross multiply
    1,140.37x = 1,573.71 × 616.40
  4. Step 4: Simplify right side
    1,140.37x = 970,030.57
  5. Step 5: Solve for x
    x = 970,030.57/1,140.37
  6. Step 6: Final answer
    x = 850.63

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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.