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Finding the Fourth Proportional to 738,173.22, 1,018,679.03 and 398,641.47

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Solution

The fourth proportional to 738,173.22, 1,018,679.03 and 398,641.47 is: 550,125.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,173.22 : 1,018,679.03 = 398,641.47 : x
  2. Step 2: Convert to fraction form
    738,173.22/1,018,679.03 = 398,641.47/x
  3. Step 3: Cross multiply
    738,173.22x = 1,018,679.03 × 398,641.47
  4. Step 4: Simplify right side
    738,173.22x = 406,087,700,261.10
  5. Step 5: Solve for x
    x = 406,087,700,261.10/738,173.22
  6. Step 6: Final answer
    x = 550,125.22

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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.