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Finding the Fourth Proportional to 621.97, 858.47 and 373.34

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Solution

The fourth proportional to 621.97, 858.47 and 373.34 is: 515.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.97 : 858.47 = 373.34 : x
  2. Step 2: Convert to fraction form
    621.97/858.47 = 373.34/x
  3. Step 3: Cross multiply
    621.97x = 858.47 × 373.34
  4. Step 4: Simplify right side
    621.97x = 320,501.47
  5. Step 5: Solve for x
    x = 320,501.47/621.97
  6. Step 6: Final answer
    x = 515.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.