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Finding the Fourth Proportional to 646,261.50, 891,820.61 and 374,334.70

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Solution

The fourth proportional to 646,261.50, 891,820.61 and 374,334.70 is: 516,570.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,261.50 : 891,820.61 = 374,334.70 : x
  2. Step 2: Convert to fraction form
    646,261.50/891,820.61 = 374,334.70/x
  3. Step 3: Cross multiply
    646,261.50x = 891,820.61 × 374,334.70
  4. Step 4: Simplify right side
    646,261.50x = 333,839,404,551.26
  5. Step 5: Solve for x
    x = 333,839,404,551.26/646,261.50
  6. Step 6: Final answer
    x = 516,570.16

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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.