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Finding the Fourth Proportional to 842.65, 1,263.16 and 452.36

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Solution

The fourth proportional to 842.65, 1,263.16 and 452.36 is: 678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.65 : 1,263.16 = 452.36 : x
  2. Step 2: Convert to fraction form
    842.65/1,263.16 = 452.36/x
  3. Step 3: Cross multiply
    842.65x = 1,263.16 × 452.36
  4. Step 4: Simplify right side
    842.65x = 571,403.06
  5. Step 5: Solve for x
    x = 571,403.06/842.65
  6. Step 6: Final answer
    x = 678.10

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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.