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Finding the Fourth Proportional to 878,692.96, 1,212,557.80 and 516,154

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Solution

The fourth proportional to 878,692.96, 1,212,557.80 and 516,154 is: 712,269.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,692.96 : 1,212,557.80 = 516,154 : x
  2. Step 2: Convert to fraction form
    878,692.96/1,212,557.80 = 516,154/x
  3. Step 3: Cross multiply
    878,692.96x = 1,212,557.80 × 516,154
  4. Step 4: Simplify right side
    878,692.96x = 625,866,558,701.20
  5. Step 5: Solve for x
    x = 625,866,558,701.20/878,692.96
  6. Step 6: Final answer
    x = 712,269.91

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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.