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Finding the Fourth Proportional to 646,116.74, 891,692.61 and 374,189.41

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Solution

The fourth proportional to 646,116.74, 891,692.61 and 374,189.41 is: 516,411.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,116.74 : 891,692.61 = 374,189.41 : x
  2. Step 2: Convert to fraction form
    646,116.74/891,692.61 = 374,189.41/x
  3. Step 3: Cross multiply
    646,116.74x = 891,692.61 × 374,189.41
  4. Step 4: Simplify right side
    646,116.74x = 333,661,931,637.26
  5. Step 5: Solve for x
    x = 333,661,931,637.26/646,116.74
  6. Step 6: Final answer
    x = 516,411.22

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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.