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Finding the Fourth Proportional to 948.23, 1,308.55 and 555.17

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Solution

The fourth proportional to 948.23, 1,308.55 and 555.17 is: 766.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.23 : 1,308.55 = 555.17 : x
  2. Step 2: Convert to fraction form
    948.23/1,308.55 = 555.17/x
  3. Step 3: Cross multiply
    948.23x = 1,308.55 × 555.17
  4. Step 4: Simplify right side
    948.23x = 726,467.70
  5. Step 5: Solve for x
    x = 726,467.70/948.23
  6. Step 6: Final answer
    x = 766.13

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Double scale
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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.