Home / 1,231,991.75-1,700,130.56-688,135.40

Finding the Fourth Proportional to 1,231,991.75, 1,700,130.56 and 688,135.40

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Solution

The fourth proportional to 1,231,991.75, 1,700,130.56 and 688,135.40 is: 949,616.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,991.75 : 1,700,130.56 = 688,135.40 : x
  2. Step 2: Convert to fraction form
    1,231,991.75/1,700,130.56 = 688,135.40/x
  3. Step 3: Cross multiply
    1,231,991.75x = 1,700,130.56 × 688,135.40
  4. Step 4: Simplify right side
    1,231,991.75x = 1,169,920,011,016.49
  5. Step 5: Solve for x
    x = 1,169,920,011,016.49/1,231,991.75
  6. Step 6: Final answer
    x = 949,616.76

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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.