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Finding the Fourth Proportional to 948.77, 1,309.36 and 529.15

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Solution

The fourth proportional to 948.77, 1,309.36 and 529.15 is: 730.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.77 : 1,309.36 = 529.15 : x
  2. Step 2: Convert to fraction form
    948.77/1,309.36 = 529.15/x
  3. Step 3: Cross multiply
    948.77x = 1,309.36 × 529.15
  4. Step 4: Simplify right side
    948.77x = 692,842.62
  5. Step 5: Solve for x
    x = 692,842.62/948.77
  6. Step 6: Final answer
    x = 730.26

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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.