Home / 879,771.10-1,320,320.09-643,722.78

Finding the Fourth Proportional to 879,771.10, 1,320,320.09 and 643,722.78

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Solution

The fourth proportional to 879,771.10, 1,320,320.09 and 643,722.78 is: 966,069.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,771.10 : 1,320,320.09 = 643,722.78 : x
  2. Step 2: Convert to fraction form
    879,771.10/1,320,320.09 = 643,722.78/x
  3. Step 3: Cross multiply
    879,771.10x = 1,320,320.09 × 643,722.78
  4. Step 4: Simplify right side
    879,771.10x = 849,920,118,824.65
  5. Step 5: Solve for x
    x = 849,920,118,824.65/879,771.10
  6. Step 6: Final answer
    x = 966,069.60

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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.