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Finding the Fourth Proportional to 891,713.40, 1,230,564.40 and 509,748.72

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Solution

The fourth proportional to 891,713.40, 1,230,564.40 and 509,748.72 is: 703,453.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,713.40 : 1,230,564.40 = 509,748.72 : x
  2. Step 2: Convert to fraction form
    891,713.40/1,230,564.40 = 509,748.72/x
  3. Step 3: Cross multiply
    891,713.40x = 1,230,564.40 × 509,748.72
  4. Step 4: Simplify right side
    891,713.40x = 627,278,627,777.57
  5. Step 5: Solve for x
    x = 627,278,627,777.57/891,713.40
  6. Step 6: Final answer
    x = 703,453.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.