Home / 1,225,181.72-1,690,503-715,785.68

Finding the Fourth Proportional to 1,225,181.72, 1,690,503 and 715,785.68

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Solution

The fourth proportional to 1,225,181.72, 1,690,503 and 715,785.68 is: 987,639.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,181.72 : 1,690,503 = 715,785.68 : x
  2. Step 2: Convert to fraction form
    1,225,181.72/1,690,503 = 715,785.68/x
  3. Step 3: Cross multiply
    1,225,181.72x = 1,690,503 × 715,785.68
  4. Step 4: Simplify right side
    1,225,181.72x = 1,210,037,839,397.04
  5. Step 5: Solve for x
    x = 1,210,037,839,397.04/1,225,181.72
  6. Step 6: Final answer
    x = 987,639.48

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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.