Home / 705,323.20-1,058,438.40-390,006.40

Finding the Fourth Proportional to 705,323.20, 1,058,438.40 and 390,006.40

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Solution

The fourth proportional to 705,323.20, 1,058,438.40 and 390,006.40 is: 585,260.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,323.20 : 1,058,438.40 = 390,006.40 : x
  2. Step 2: Convert to fraction form
    705,323.20/1,058,438.40 = 390,006.40/x
  3. Step 3: Cross multiply
    705,323.20x = 1,058,438.40 × 390,006.40
  4. Step 4: Simplify right side
    705,323.20x = 412,797,750,005.76
  5. Step 5: Solve for x
    x = 412,797,750,005.76/705,323.20
  6. Step 6: Final answer
    x = 585,260.42

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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.