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Finding the Fourth Proportional to 1,203.32, 1,803.36 and 545.42

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Solution

The fourth proportional to 1,203.32, 1,803.36 and 545.42 is: 817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.32 : 1,803.36 = 545.42 : x
  2. Step 2: Convert to fraction form
    1,203.32/1,803.36 = 545.42/x
  3. Step 3: Cross multiply
    1,203.32x = 1,803.36 × 545.42
  4. Step 4: Simplify right side
    1,203.32x = 983,588.61
  5. Step 5: Solve for x
    x = 983,588.61/1,203.32
  6. Step 6: Final answer
    x = 817.40

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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.