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Finding the Fourth Proportional to 923.84, 1,275.40 and 713.56

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Solution

The fourth proportional to 923.84, 1,275.40 and 713.56 is: 985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.84 : 1,275.40 = 713.56 : x
  2. Step 2: Convert to fraction form
    923.84/1,275.40 = 713.56/x
  3. Step 3: Cross multiply
    923.84x = 1,275.40 × 713.56
  4. Step 4: Simplify right side
    923.84x = 910,074.42
  5. Step 5: Solve for x
    x = 910,074.42/923.84
  6. Step 6: Final answer
    x = 985.10

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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.