Home / 813,927.20-1,221,328.20-340,660.40

Finding the Fourth Proportional to 813,927.20, 1,221,328.20 and 340,660.40

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Solution

The fourth proportional to 813,927.20, 1,221,328.20 and 340,660.40 is: 511,173.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,927.20 : 1,221,328.20 = 340,660.40 : x
  2. Step 2: Convert to fraction form
    813,927.20/1,221,328.20 = 340,660.40/x
  3. Step 3: Cross multiply
    813,927.20x = 1,221,328.20 × 340,660.40
  4. Step 4: Simplify right side
    813,927.20x = 416,058,153,143.28
  5. Step 5: Solve for x
    x = 416,058,153,143.28/813,927.20
  6. Step 6: Final answer
    x = 511,173.67

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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.