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Finding the Fourth Proportional to 615.56, 919 and 558.16

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Solution

The fourth proportional to 615.56, 919 and 558.16 is: 833.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.56 : 919 = 558.16 : x
  2. Step 2: Convert to fraction form
    615.56/919 = 558.16/x
  3. Step 3: Cross multiply
    615.56x = 919 × 558.16
  4. Step 4: Simplify right side
    615.56x = 512,949.04
  5. Step 5: Solve for x
    x = 512,949.04/615.56
  6. Step 6: Final answer
    x = 833.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.