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Finding the Fourth Proportional to 815.07, 1,124.77 and 442.04

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Solution

The fourth proportional to 815.07, 1,124.77 and 442.04 is: 610.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.07 : 1,124.77 = 442.04 : x
  2. Step 2: Convert to fraction form
    815.07/1,124.77 = 442.04/x
  3. Step 3: Cross multiply
    815.07x = 1,124.77 × 442.04
  4. Step 4: Simplify right side
    815.07x = 497,197.98
  5. Step 5: Solve for x
    x = 497,197.98/815.07
  6. Step 6: Final answer
    x = 610.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.