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Finding the Fourth Proportional to 738,158.70, 1,018,659 and 398,626.92

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Solution

The fourth proportional to 738,158.70, 1,018,659 and 398,626.92 is: 550,105.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,158.70 : 1,018,659 = 398,626.92 : x
  2. Step 2: Convert to fraction form
    738,158.70/1,018,659 = 398,626.92/x
  3. Step 3: Cross multiply
    738,158.70x = 1,018,659 × 398,626.92
  4. Step 4: Simplify right side
    738,158.70x = 406,064,899,700.28
  5. Step 5: Solve for x
    x = 406,064,899,700.28/738,158.70
  6. Step 6: Final answer
    x = 550,105.15

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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.