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Finding the Fourth Proportional to 868,390.40, 1,302,585.60 and 807,564.80

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Solution

The fourth proportional to 868,390.40, 1,302,585.60 and 807,564.80 is: 1,211,347.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,390.40 : 1,302,585.60 = 807,564.80 : x
  2. Step 2: Convert to fraction form
    868,390.40/1,302,585.60 = 807,564.80/x
  3. Step 3: Cross multiply
    868,390.40x = 1,302,585.60 × 807,564.80
  4. Step 4: Simplify right side
    868,390.40x = 1,051,922,279,546.88
  5. Step 5: Solve for x
    x = 1,051,922,279,546.88/868,390.40
  6. Step 6: Final answer
    x = 1,211,347.20

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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.