Home / 776,721.72-1,071,750.78-490,396.44

Finding the Fourth Proportional to 776,721.72, 1,071,750.78 and 490,396.44

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Solution

The fourth proportional to 776,721.72, 1,071,750.78 and 490,396.44 is: 676,668.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,721.72 : 1,071,750.78 = 490,396.44 : x
  2. Step 2: Convert to fraction form
    776,721.72/1,071,750.78 = 490,396.44/x
  3. Step 3: Cross multiply
    776,721.72x = 1,071,750.78 × 490,396.44
  4. Step 4: Simplify right side
    776,721.72x = 525,582,767,079.22
  5. Step 5: Solve for x
    x = 525,582,767,079.22/776,721.72
  6. Step 6: Final answer
    x = 676,668.04

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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.