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Finding the Fourth Proportional to 632.80, 948.30 and 555.40

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Solution

The fourth proportional to 632.80, 948.30 and 555.40 is: 832.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.80 : 948.30 = 555.40 : x
  2. Step 2: Convert to fraction form
    632.80/948.30 = 555.40/x
  3. Step 3: Cross multiply
    632.80x = 948.30 × 555.40
  4. Step 4: Simplify right side
    632.80x = 526,685.82
  5. Step 5: Solve for x
    x = 526,685.82/632.80
  6. Step 6: Final answer
    x = 832.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.