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Finding the Fourth Proportional to 1,806.40, 2,495.16 and 1,478.80

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Solution

The fourth proportional to 1,806.40, 2,495.16 and 1,478.80 is: 2,042.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.40 : 2,495.16 = 1,478.80 : x
  2. Step 2: Convert to fraction form
    1,806.40/2,495.16 = 1,478.80/x
  3. Step 3: Cross multiply
    1,806.40x = 2,495.16 × 1,478.80
  4. Step 4: Simplify right side
    1,806.40x = 3,689,842.61
  5. Step 5: Solve for x
    x = 3,689,842.61/1,806.40
  6. Step 6: Final answer
    x = 2,042.65

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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.