Home / 918,868.90-1,378,521.33-311,645.66

Finding the Fourth Proportional to 918,868.90, 1,378,521.33 and 311,645.66

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Solution

The fourth proportional to 918,868.90, 1,378,521.33 and 311,645.66 is: 467,542.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,868.90 : 1,378,521.33 = 311,645.66 : x
  2. Step 2: Convert to fraction form
    918,868.90/1,378,521.33 = 311,645.66/x
  3. Step 3: Cross multiply
    918,868.90x = 1,378,521.33 × 311,645.66
  4. Step 4: Simplify right side
    918,868.90x = 429,610,193,158.23
  5. Step 5: Solve for x
    x = 429,610,193,158.23/918,868.90
  6. Step 6: Final answer
    x = 467,542.43

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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.