Home / 738,145.41-1,018,640.71-398,613.66

Finding the Fourth Proportional to 738,145.41, 1,018,640.71 and 398,613.66

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Solution

The fourth proportional to 738,145.41, 1,018,640.71 and 398,613.66 is: 550,086.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,145.41 : 1,018,640.71 = 398,613.66 : x
  2. Step 2: Convert to fraction form
    738,145.41/1,018,640.71 = 398,613.66/x
  3. Step 3: Cross multiply
    738,145.41x = 1,018,640.71 × 398,613.66
  4. Step 4: Simplify right side
    738,145.41x = 406,044,098,316.46
  5. Step 5: Solve for x
    x = 406,044,098,316.46/738,145.41
  6. Step 6: Final answer
    x = 550,086.87

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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.