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Finding the Fourth Proportional to 653.30, 985.77 and 627.99

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Solution

The fourth proportional to 653.30, 985.77 and 627.99 is: 947.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.30 : 985.77 = 627.99 : x
  2. Step 2: Convert to fraction form
    653.30/985.77 = 627.99/x
  3. Step 3: Cross multiply
    653.30x = 985.77 × 627.99
  4. Step 4: Simplify right side
    653.30x = 619,048.77
  5. Step 5: Solve for x
    x = 619,048.77/653.30
  6. Step 6: Final answer
    x = 947.57

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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.