Home / 912,721.20-1,369,859.40-408,058.80

Finding the Fourth Proportional to 912,721.20, 1,369,859.40 and 408,058.80

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Solution

The fourth proportional to 912,721.20, 1,369,859.40 and 408,058.80 is: 612,435.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,721.20 : 1,369,859.40 = 408,058.80 : x
  2. Step 2: Convert to fraction form
    912,721.20/1,369,859.40 = 408,058.80/x
  3. Step 3: Cross multiply
    912,721.20x = 1,369,859.40 × 408,058.80
  4. Step 4: Simplify right side
    912,721.20x = 558,983,182,932.72
  5. Step 5: Solve for x
    x = 558,983,182,932.72/912,721.20
  6. Step 6: Final answer
    x = 612,435.85

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1.5x scale

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.