Home / 283,120.40-390,692.04-155,792.72

Finding the Fourth Proportional to 283,120.40, 390,692.04 and 155,792.72

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Solution

The fourth proportional to 283,120.40, 390,692.04 and 155,792.72 is: 214,986.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,120.40 : 390,692.04 = 155,792.72 : x
  2. Step 2: Convert to fraction form
    283,120.40/390,692.04 = 155,792.72/x
  3. Step 3: Cross multiply
    283,120.40x = 390,692.04 × 155,792.72
  4. Step 4: Simplify right side
    283,120.40x = 60,866,975,593.95
  5. Step 5: Solve for x
    x = 60,866,975,593.95/283,120.40
  6. Step 6: Final answer
    x = 214,986.19

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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.