Home / 1,440.09-2,159.81-515.71

Finding the Fourth Proportional to 1,440.09, 2,159.81 and 515.71

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Solution

The fourth proportional to 1,440.09, 2,159.81 and 515.71 is: 773.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.09 : 2,159.81 = 515.71 : x
  2. Step 2: Convert to fraction form
    1,440.09/2,159.81 = 515.71/x
  3. Step 3: Cross multiply
    1,440.09x = 2,159.81 × 515.71
  4. Step 4: Simplify right side
    1,440.09x = 1,113,831.50
  5. Step 5: Solve for x
    x = 1,113,831.50/1,440.09
  6. Step 6: Final answer
    x = 773.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.