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Finding the Fourth Proportional to 872,409.60, 1,308,614.40 and 573,811.20

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Solution

The fourth proportional to 872,409.60, 1,308,614.40 and 573,811.20 is: 860,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,409.60 : 1,308,614.40 = 573,811.20 : x
  2. Step 2: Convert to fraction form
    872,409.60/1,308,614.40 = 573,811.20/x
  3. Step 3: Cross multiply
    872,409.60x = 1,308,614.40 × 573,811.20
  4. Step 4: Simplify right side
    872,409.60x = 750,897,599,201.28
  5. Step 5: Solve for x
    x = 750,897,599,201.28/872,409.60
  6. Step 6: Final answer
    x = 860,716.80

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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.