Home / 578,860.40-867,124.20-389,903.60

Finding the Fourth Proportional to 578,860.40, 867,124.20 and 389,903.60

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Solution

The fourth proportional to 578,860.40, 867,124.20 and 389,903.60 is: 584,069.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,860.40 : 867,124.20 = 389,903.60 : x
  2. Step 2: Convert to fraction form
    578,860.40/867,124.20 = 389,903.60/x
  3. Step 3: Cross multiply
    578,860.40x = 867,124.20 × 389,903.60
  4. Step 4: Simplify right side
    578,860.40x = 338,094,847,227.12
  5. Step 5: Solve for x
    x = 338,094,847,227.12/578,860.40
  6. Step 6: Final answer
    x = 584,069.75

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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.