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Finding the Fourth Proportional to 806,590.80, 1,209,886.20 and 215,614.80

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Solution

The fourth proportional to 806,590.80, 1,209,886.20 and 215,614.80 is: 323,422.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,590.80 : 1,209,886.20 = 215,614.80 : x
  2. Step 2: Convert to fraction form
    806,590.80/1,209,886.20 = 215,614.80/x
  3. Step 3: Cross multiply
    806,590.80x = 1,209,886.20 × 215,614.80
  4. Step 4: Simplify right side
    806,590.80x = 260,869,371,035.76
  5. Step 5: Solve for x
    x = 260,869,371,035.76/806,590.80
  6. Step 6: Final answer
    x = 323,422.20

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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.