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Finding the Fourth Proportional to 612,220, 844,862.72 and 340,313.18

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Solution

The fourth proportional to 612,220, 844,862.72 and 340,313.18 is: 469,631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,220 : 844,862.72 = 340,313.18 : x
  2. Step 2: Convert to fraction form
    612,220/844,862.72 = 340,313.18/x
  3. Step 3: Cross multiply
    612,220x = 844,862.72 × 340,313.18
  4. Step 4: Simplify right side
    612,220x = 287,517,918,906.65
  5. Step 5: Solve for x
    x = 287,517,918,906.65/612,220
  6. Step 6: Final answer
    x = 469,631.70

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1.5x scale

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.