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Finding the Fourth Proportional to 904.77, 1,247.87 and 572.87

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Solution

The fourth proportional to 904.77, 1,247.87 and 572.87 is: 790.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.77 : 1,247.87 = 572.87 : x
  2. Step 2: Convert to fraction form
    904.77/1,247.87 = 572.87/x
  3. Step 3: Cross multiply
    904.77x = 1,247.87 × 572.87
  4. Step 4: Simplify right side
    904.77x = 714,871.84
  5. Step 5: Solve for x
    x = 714,871.84/904.77
  6. Step 6: Final answer
    x = 790.11

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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.