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Finding the Fourth Proportional to 687,773.80, 1,029,692.40 and 609,041.80

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Solution

The fourth proportional to 687,773.80, 1,029,692.40 and 609,041.80 is: 911,819.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,773.80 : 1,029,692.40 = 609,041.80 : x
  2. Step 2: Convert to fraction form
    687,773.80/1,029,692.40 = 609,041.80/x
  3. Step 3: Cross multiply
    687,773.80x = 1,029,692.40 × 609,041.80
  4. Step 4: Simplify right side
    687,773.80x = 627,125,712,742.32
  5. Step 5: Solve for x
    x = 627,125,712,742.32/687,773.80
  6. Step 6: Final answer
    x = 911,819.72

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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.