Home / 612,621.92-918,134.22-312,849.84

Finding the Fourth Proportional to 612,621.92, 918,134.22 and 312,849.84

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Solution

The fourth proportional to 612,621.92, 918,134.22 and 312,849.84 is: 468,866.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,621.92 : 918,134.22 = 312,849.84 : x
  2. Step 2: Convert to fraction form
    612,621.92/918,134.22 = 312,849.84/x
  3. Step 3: Cross multiply
    612,621.92x = 918,134.22 × 312,849.84
  4. Step 4: Simplify right side
    612,621.92x = 287,238,143,825.53
  5. Step 5: Solve for x
    x = 287,238,143,825.53/612,621.92
  6. Step 6: Final answer
    x = 468,866.91

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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.