Home / 738,396.72-1,018,987.92-398,865.12

Finding the Fourth Proportional to 738,396.72, 1,018,987.92 and 398,865.12

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Solution

The fourth proportional to 738,396.72, 1,018,987.92 and 398,865.12 is: 550,434.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,396.72 : 1,018,987.92 = 398,865.12 : x
  2. Step 2: Convert to fraction form
    738,396.72/1,018,987.92 = 398,865.12/x
  3. Step 3: Cross multiply
    738,396.72x = 1,018,987.92 × 398,865.12
  4. Step 4: Simplify right side
    738,396.72x = 406,438,738,989.35
  5. Step 5: Solve for x
    x = 406,438,738,989.35/738,396.72
  6. Step 6: Final answer
    x = 550,434.11

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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.