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Finding the Fourth Proportional to 945.80, 1,305.17 and 526.17

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Solution

The fourth proportional to 945.80, 1,305.17 and 526.17 is: 726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.80 : 1,305.17 = 526.17 : x
  2. Step 2: Convert to fraction form
    945.80/1,305.17 = 526.17/x
  3. Step 3: Cross multiply
    945.80x = 1,305.17 × 526.17
  4. Step 4: Simplify right side
    945.80x = 686,741.30
  5. Step 5: Solve for x
    x = 686,741.30/945.80
  6. Step 6: Final answer
    x = 726.10

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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.