Home / 918,643.80-1,378,008.90-287,578.20

Finding the Fourth Proportional to 918,643.80, 1,378,008.90 and 287,578.20

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Solution

The fourth proportional to 918,643.80, 1,378,008.90 and 287,578.20 is: 431,380.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,643.80 : 1,378,008.90 = 287,578.20 : x
  2. Step 2: Convert to fraction form
    918,643.80/1,378,008.90 = 287,578.20/x
  3. Step 3: Cross multiply
    918,643.80x = 1,378,008.90 × 287,578.20
  4. Step 4: Simplify right side
    918,643.80x = 396,285,319,045.98
  5. Step 5: Solve for x
    x = 396,285,319,045.98/918,643.80
  6. Step 6: Final answer
    x = 431,380.82

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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.