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Finding the Fourth Proportional to 813,888.40, 1,220,813.40 and 222,912.40

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Solution

The fourth proportional to 813,888.40, 1,220,813.40 and 222,912.40 is: 334,363.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,888.40 : 1,220,813.40 = 222,912.40 : x
  2. Step 2: Convert to fraction form
    813,888.40/1,220,813.40 = 222,912.40/x
  3. Step 3: Cross multiply
    813,888.40x = 1,220,813.40 × 222,912.40
  4. Step 4: Simplify right side
    813,888.40x = 272,134,444,946.16
  5. Step 5: Solve for x
    x = 272,134,444,946.16/813,888.40
  6. Step 6: Final answer
    x = 334,363.34

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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.