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Finding the Fourth Proportional to 1,041.32, 1,561.41 and 347.63

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Solution

The fourth proportional to 1,041.32, 1,561.41 and 347.63 is: 521.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.32 : 1,561.41 = 347.63 : x
  2. Step 2: Convert to fraction form
    1,041.32/1,561.41 = 347.63/x
  3. Step 3: Cross multiply
    1,041.32x = 1,561.41 × 347.63
  4. Step 4: Simplify right side
    1,041.32x = 542,785.15
  5. Step 5: Solve for x
    x = 542,785.15/1,041.32
  6. Step 6: Final answer
    x = 521.25

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Double scale
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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.