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Finding the Fourth Proportional to 615.28, 845.60 and 553.77

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Solution

The fourth proportional to 615.28, 845.60 and 553.77 is: 761.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.28 : 845.60 = 553.77 : x
  2. Step 2: Convert to fraction form
    615.28/845.60 = 553.77/x
  3. Step 3: Cross multiply
    615.28x = 845.60 × 553.77
  4. Step 4: Simplify right side
    615.28x = 468,267.91
  5. Step 5: Solve for x
    x = 468,267.91/615.28
  6. Step 6: Final answer
    x = 761.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.