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Finding the Fourth Proportional to 653.18, 985.58 and 627.86

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Solution

The fourth proportional to 653.18, 985.58 and 627.86 is: 947.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.18 : 985.58 = 627.86 : x
  2. Step 2: Convert to fraction form
    653.18/985.58 = 627.86/x
  3. Step 3: Cross multiply
    653.18x = 985.58 × 627.86
  4. Step 4: Simplify right side
    653.18x = 618,807.04
  5. Step 5: Solve for x
    x = 618,807.04/653.18
  6. Step 6: Final answer
    x = 947.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.