Home / 1,230,900.71-1,698,728.56-687,142.64

Finding the Fourth Proportional to 1,230,900.71, 1,698,728.56 and 687,142.64

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Solution

The fourth proportional to 1,230,900.71, 1,698,728.56 and 687,142.64 is: 948,304.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,900.71 : 1,698,728.56 = 687,142.64 : x
  2. Step 2: Convert to fraction form
    1,230,900.71/1,698,728.56 = 687,142.64/x
  3. Step 3: Cross multiply
    1,230,900.71x = 1,698,728.56 × 687,142.64
  4. Step 4: Simplify right side
    1,230,900.71x = 1,167,268,829,890.76
  5. Step 5: Solve for x
    x = 1,167,268,829,890.76/1,230,900.71
  6. Step 6: Final answer
    x = 948,304.62

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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.