Home / 918,309.40-1,378,120.20-386,212.30

Finding the Fourth Proportional to 918,309.40, 1,378,120.20 and 386,212.30

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Solution

The fourth proportional to 918,309.40, 1,378,120.20 and 386,212.30 is: 579,594.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,309.40 : 1,378,120.20 = 386,212.30 : x
  2. Step 2: Convert to fraction form
    918,309.40/1,378,120.20 = 386,212.30/x
  3. Step 3: Cross multiply
    918,309.40x = 1,378,120.20 × 386,212.30
  4. Step 4: Simplify right side
    918,309.40x = 532,246,972,118.46
  5. Step 5: Solve for x
    x = 532,246,972,118.46/918,309.40
  6. Step 6: Final answer
    x = 579,594.39

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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.