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Finding the Fourth Proportional to 805,897.80, 1,207,809.90 and 490,019.40

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Solution

The fourth proportional to 805,897.80, 1,207,809.90 and 490,019.40 is: 734,398.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,897.80 : 1,207,809.90 = 490,019.40 : x
  2. Step 2: Convert to fraction form
    805,897.80/1,207,809.90 = 490,019.40/x
  3. Step 3: Cross multiply
    805,897.80x = 1,207,809.90 × 490,019.40
  4. Step 4: Simplify right side
    805,897.80x = 591,850,282,512.06
  5. Step 5: Solve for x
    x = 591,850,282,512.06/805,897.80
  6. Step 6: Final answer
    x = 734,398.68

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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.