Home / 389,901.20-584,448.60-212,032.40

Finding the Fourth Proportional to 389,901.20, 584,448.60 and 212,032.40

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Solution

The fourth proportional to 389,901.20, 584,448.60 and 212,032.40 is: 317,829.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,901.20 : 584,448.60 = 212,032.40 : x
  2. Step 2: Convert to fraction form
    389,901.20/584,448.60 = 212,032.40/x
  3. Step 3: Cross multiply
    389,901.20x = 584,448.60 × 212,032.40
  4. Step 4: Simplify right side
    389,901.20x = 123,922,039,334.64
  5. Step 5: Solve for x
    x = 123,922,039,334.64/389,901.20
  6. Step 6: Final answer
    x = 317,829.34

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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.