Home / 662,815.70-914,789.55-390,913.52

Finding the Fourth Proportional to 662,815.70, 914,789.55 and 390,913.52

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Solution

The fourth proportional to 662,815.70, 914,789.55 and 390,913.52 is: 539,521.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,815.70 : 914,789.55 = 390,913.52 : x
  2. Step 2: Convert to fraction form
    662,815.70/914,789.55 = 390,913.52/x
  3. Step 3: Cross multiply
    662,815.70x = 914,789.55 × 390,913.52
  4. Step 4: Simplify right side
    662,815.70x = 357,603,603,049.72
  5. Step 5: Solve for x
    x = 357,603,603,049.72/662,815.70
  6. Step 6: Final answer
    x = 539,521.93

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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.