Home / 389,919.40-584,879.10-212,772.40

Finding the Fourth Proportional to 389,919.40, 584,879.10 and 212,772.40

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Solution

The fourth proportional to 389,919.40, 584,879.10 and 212,772.40 is: 319,158.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,919.40 : 584,879.10 = 212,772.40 : x
  2. Step 2: Convert to fraction form
    389,919.40/584,879.10 = 212,772.40/x
  3. Step 3: Cross multiply
    389,919.40x = 584,879.10 × 212,772.40
  4. Step 4: Simplify right side
    389,919.40x = 124,446,129,816.84
  5. Step 5: Solve for x
    x = 124,446,129,816.84/389,919.40
  6. Step 6: Final answer
    x = 319,158.60

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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.