Home / 648,870.36-895,517.17-390,877.55

Finding the Fourth Proportional to 648,870.36, 895,517.17 and 390,877.55

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Solution

The fourth proportional to 648,870.36, 895,517.17 and 390,877.55 is: 539,456.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,870.36 : 895,517.17 = 390,877.55 : x
  2. Step 2: Convert to fraction form
    648,870.36/895,517.17 = 390,877.55/x
  3. Step 3: Cross multiply
    648,870.36x = 895,517.17 × 390,877.55
  4. Step 4: Simplify right side
    648,870.36x = 350,037,557,392.53
  5. Step 5: Solve for x
    x = 350,037,557,392.53/648,870.36
  6. Step 6: Final answer
    x = 539,456.85

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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.