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Finding the Fourth Proportional to 1,460.74, 2,015.75 and 831.19

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Solution

The fourth proportional to 1,460.74, 2,015.75 and 831.19 is: 1,147.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,460.74 : 2,015.75 = 831.19 : x
  2. Step 2: Convert to fraction form
    1,460.74/2,015.75 = 831.19/x
  3. Step 3: Cross multiply
    1,460.74x = 2,015.75 × 831.19
  4. Step 4: Simplify right side
    1,460.74x = 1,675,461.16
  5. Step 5: Solve for x
    x = 1,675,461.16/1,460.74
  6. Step 6: Final answer
    x = 1,147.00

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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.