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Finding the Fourth Proportional to 1,041.77, 1,561.95 and 425.30

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Solution

The fourth proportional to 1,041.77, 1,561.95 and 425.30 is: 637.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.77 : 1,561.95 = 425.30 : x
  2. Step 2: Convert to fraction form
    1,041.77/1,561.95 = 425.30/x
  3. Step 3: Cross multiply
    1,041.77x = 1,561.95 × 425.30
  4. Step 4: Simplify right side
    1,041.77x = 664,301.24
  5. Step 5: Solve for x
    x = 664,301.24/1,041.77
  6. Step 6: Final answer
    x = 637.67

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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.