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Finding the Fourth Proportional to 1,503.15, 2,254.86 and 407.49

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Solution

The fourth proportional to 1,503.15, 2,254.86 and 407.49 is: 611.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.15 : 2,254.86 = 407.49 : x
  2. Step 2: Convert to fraction form
    1,503.15/2,254.86 = 407.49/x
  3. Step 3: Cross multiply
    1,503.15x = 2,254.86 × 407.49
  4. Step 4: Simplify right side
    1,503.15x = 918,832.90
  5. Step 5: Solve for x
    x = 918,832.90/1,503.15
  6. Step 6: Final answer
    x = 611.27

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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.