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Finding the Fourth Proportional to 948.16, 1,308.38 and 555.18

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Solution

The fourth proportional to 948.16, 1,308.38 and 555.18 is: 766.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.16 : 1,308.38 = 555.18 : x
  2. Step 2: Convert to fraction form
    948.16/1,308.38 = 555.18/x
  3. Step 3: Cross multiply
    948.16x = 1,308.38 × 555.18
  4. Step 4: Simplify right side
    948.16x = 726,386.41
  5. Step 5: Solve for x
    x = 726,386.41/948.16
  6. Step 6: Final answer
    x = 766.10

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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.