Home / 921,112.65-1,271,229.06-513,280.89

Finding the Fourth Proportional to 921,112.65, 1,271,229.06 and 513,280.89

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Solution

The fourth proportional to 921,112.65, 1,271,229.06 and 513,280.89 is: 708,379.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,112.65 : 1,271,229.06 = 513,280.89 : x
  2. Step 2: Convert to fraction form
    921,112.65/1,271,229.06 = 513,280.89/x
  3. Step 3: Cross multiply
    921,112.65x = 1,271,229.06 × 513,280.89
  4. Step 4: Simplify right side
    921,112.65x = 652,497,583,310.66
  5. Step 5: Solve for x
    x = 652,497,583,310.66/921,112.65
  6. Step 6: Final answer
    x = 708,379.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.