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Finding the Fourth Proportional to 933,692.80, 1,397,428.80 and 821,718.40

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Solution

The fourth proportional to 933,692.80, 1,397,428.80 and 821,718.40 is: 1,229,840.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    933,692.80 : 1,397,428.80 = 821,718.40 : x
  2. Step 2: Convert to fraction form
    933,692.80/1,397,428.80 = 821,718.40/x
  3. Step 3: Cross multiply
    933,692.80x = 1,397,428.80 × 821,718.40
  4. Step 4: Simplify right side
    933,692.80x = 1,148,292,957,649.92
  5. Step 5: Solve for x
    x = 1,148,292,957,649.92/933,692.80
  6. Step 6: Final answer
    x = 1,229,840.22

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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.