Home / 920,135.80-1,380,246.90-289,070.20

Finding the Fourth Proportional to 920,135.80, 1,380,246.90 and 289,070.20

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Solution

The fourth proportional to 920,135.80, 1,380,246.90 and 289,070.20 is: 433,618.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,135.80 : 1,380,246.90 = 289,070.20 : x
  2. Step 2: Convert to fraction form
    920,135.80/1,380,246.90 = 289,070.20/x
  3. Step 3: Cross multiply
    920,135.80x = 1,380,246.90 × 289,070.20
  4. Step 4: Simplify right side
    920,135.80x = 398,988,247,432.38
  5. Step 5: Solve for x
    x = 398,988,247,432.38/920,135.80
  6. Step 6: Final answer
    x = 433,618.87

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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.