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Finding the Fourth Proportional to 657.51, 980.52 and 621.11

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Solution

The fourth proportional to 657.51, 980.52 and 621.11 is: 926.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.51 : 980.52 = 621.11 : x
  2. Step 2: Convert to fraction form
    657.51/980.52 = 621.11/x
  3. Step 3: Cross multiply
    657.51x = 980.52 × 621.11
  4. Step 4: Simplify right side
    657.51x = 609,013.23
  5. Step 5: Solve for x
    x = 609,013.23/657.51
  6. Step 6: Final answer
    x = 926.24

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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.