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Finding the Fourth Proportional to 1,010.13, 1,392.53 and 716.07

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Solution

The fourth proportional to 1,010.13, 1,392.53 and 716.07 is: 987.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.13 : 1,392.53 = 716.07 : x
  2. Step 2: Convert to fraction form
    1,010.13/1,392.53 = 716.07/x
  3. Step 3: Cross multiply
    1,010.13x = 1,392.53 × 716.07
  4. Step 4: Simplify right side
    1,010.13x = 997,141.99
  5. Step 5: Solve for x
    x = 997,141.99/1,010.13
  6. Step 6: Final answer
    x = 987.15

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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.