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Finding the Fourth Proportional to 953.93, 1,315.49 and 718.45

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Solution

The fourth proportional to 953.93, 1,315.49 and 718.45 is: 990.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.93 : 1,315.49 = 718.45 : x
  2. Step 2: Convert to fraction form
    953.93/1,315.49 = 718.45/x
  3. Step 3: Cross multiply
    953.93x = 1,315.49 × 718.45
  4. Step 4: Simplify right side
    953.93x = 945,106.91
  5. Step 5: Solve for x
    x = 945,106.91/953.93
  6. Step 6: Final answer
    x = 990.75

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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.