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Finding the Fourth Proportional to 949.04, 1,309.72 and 715.76

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Solution

The fourth proportional to 949.04, 1,309.72 and 715.76 is: 987.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.04 : 1,309.72 = 715.76 : x
  2. Step 2: Convert to fraction form
    949.04/1,309.72 = 715.76/x
  3. Step 3: Cross multiply
    949.04x = 1,309.72 × 715.76
  4. Step 4: Simplify right side
    949.04x = 937,445.19
  5. Step 5: Solve for x
    x = 937,445.19/949.04
  6. Step 6: Final answer
    x = 987.78

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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.