Home / 409,795.20-614,692.80-129,312.45

Finding the Fourth Proportional to 409,795.20, 614,692.80 and 129,312.45

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Solution

The fourth proportional to 409,795.20, 614,692.80 and 129,312.45 is: 193,968.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,795.20 : 614,692.80 = 129,312.45 : x
  2. Step 2: Convert to fraction form
    409,795.20/614,692.80 = 129,312.45/x
  3. Step 3: Cross multiply
    409,795.20x = 614,692.80 × 129,312.45
  4. Step 4: Simplify right side
    409,795.20x = 79,487,431,965.36
  5. Step 5: Solve for x
    x = 79,487,431,965.36/409,795.20
  6. Step 6: Final answer
    x = 193,968.68

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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.