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Finding the Fourth Proportional to 738,396, 1,018,987.02 and 398,864.25

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Solution

The fourth proportional to 738,396, 1,018,987.02 and 398,864.25 is: 550,432.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,396 : 1,018,987.02 = 398,864.25 : x
  2. Step 2: Convert to fraction form
    738,396/1,018,987.02 = 398,864.25/x
  3. Step 3: Cross multiply
    738,396x = 1,018,987.02 × 398,864.25
  4. Step 4: Simplify right side
    738,396x = 406,437,493,492.04
  5. Step 5: Solve for x
    x = 406,437,493,492.04/738,396
  6. Step 6: Final answer
    x = 550,432.96

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Similar ratio
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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.