Home / 1,231,999.12-1,700,140.71-688,142.53

Finding the Fourth Proportional to 1,231,999.12, 1,700,140.71 and 688,142.53

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Solution

The fourth proportional to 1,231,999.12, 1,700,140.71 and 688,142.53 is: 949,626.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,999.12 : 1,700,140.71 = 688,142.53 : x
  2. Step 2: Convert to fraction form
    1,231,999.12/1,700,140.71 = 688,142.53/x
  3. Step 3: Cross multiply
    1,231,999.12x = 1,700,140.71 × 688,142.53
  4. Step 4: Simplify right side
    1,231,999.12x = 1,169,939,129,535.40
  5. Step 5: Solve for x
    x = 1,169,939,129,535.40/1,231,999.12
  6. Step 6: Final answer
    x = 949,626.60

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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.