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Finding the Fourth Proportional to 953.07, 1,315.79 and 715.10

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Solution

The fourth proportional to 953.07, 1,315.79 and 715.10 is: 987.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.07 : 1,315.79 = 715.10 : x
  2. Step 2: Convert to fraction form
    953.07/1,315.79 = 715.10/x
  3. Step 3: Cross multiply
    953.07x = 1,315.79 × 715.10
  4. Step 4: Simplify right side
    953.07x = 940,914.85
  5. Step 5: Solve for x
    x = 940,914.85/953.07
  6. Step 6: Final answer
    x = 987.25

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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.