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Finding the Fourth Proportional to 894.08, 1,340.76 and 477.20

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Solution

The fourth proportional to 894.08, 1,340.76 and 477.20 is: 715.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.08 : 1,340.76 = 477.20 : x
  2. Step 2: Convert to fraction form
    894.08/1,340.76 = 477.20/x
  3. Step 3: Cross multiply
    894.08x = 1,340.76 × 477.20
  4. Step 4: Simplify right side
    894.08x = 639,810.67
  5. Step 5: Solve for x
    x = 639,810.67/894.08
  6. Step 6: Final answer
    x = 715.61

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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.