Home / 389,261.20-583,891.80-139,968.40

Finding the Fourth Proportional to 389,261.20, 583,891.80 and 139,968.40

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Solution

The fourth proportional to 389,261.20, 583,891.80 and 139,968.40 is: 209,952.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,261.20 : 583,891.80 = 139,968.40 : x
  2. Step 2: Convert to fraction form
    389,261.20/583,891.80 = 139,968.40/x
  3. Step 3: Cross multiply
    389,261.20x = 583,891.80 × 139,968.40
  4. Step 4: Simplify right side
    389,261.20x = 81,726,401,019.12
  5. Step 5: Solve for x
    x = 81,726,401,019.12/389,261.20
  6. Step 6: Final answer
    x = 209,952.60

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1.5x scale

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.