Home / 690,037.20-1,035,104.40-390,661.20

Finding the Fourth Proportional to 690,037.20, 1,035,104.40 and 390,661.20

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Solution

The fourth proportional to 690,037.20, 1,035,104.40 and 390,661.20 is: 586,019.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,037.20 : 1,035,104.40 = 390,661.20 : x
  2. Step 2: Convert to fraction form
    690,037.20/1,035,104.40 = 390,661.20/x
  3. Step 3: Cross multiply
    690,037.20x = 1,035,104.40 × 390,661.20
  4. Step 4: Simplify right side
    690,037.20x = 404,375,127,029.28
  5. Step 5: Solve for x
    x = 404,375,127,029.28/690,037.20
  6. Step 6: Final answer
    x = 586,019.31

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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.