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Finding the Fourth Proportional to 917,314.80, 1,374,805.80 and 442,978.80

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Solution

The fourth proportional to 917,314.80, 1,374,805.80 and 442,978.80 is: 663,904.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,314.80 : 1,374,805.80 = 442,978.80 : x
  2. Step 2: Convert to fraction form
    917,314.80/1,374,805.80 = 442,978.80/x
  3. Step 3: Cross multiply
    917,314.80x = 1,374,805.80 × 442,978.80
  4. Step 4: Simplify right side
    917,314.80x = 609,009,823,517.04
  5. Step 5: Solve for x
    x = 609,009,823,517.04/917,314.80
  6. Step 6: Final answer
    x = 663,904.94

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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.