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Finding the Fourth Proportional to 904.77, 1,247.13 and 738.69

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Solution

The fourth proportional to 904.77, 1,247.13 and 738.69 is: 1,018.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.77 : 1,247.13 = 738.69 : x
  2. Step 2: Convert to fraction form
    904.77/1,247.13 = 738.69/x
  3. Step 3: Cross multiply
    904.77x = 1,247.13 × 738.69
  4. Step 4: Simplify right side
    904.77x = 921,242.46
  5. Step 5: Solve for x
    x = 921,242.46/904.77
  6. Step 6: Final answer
    x = 1,018.21

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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.