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Finding the Fourth Proportional to 738,411.10, 1,019,008.22 and 398,879.35

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Solution

The fourth proportional to 738,411.10, 1,019,008.22 and 398,879.35 is: 550,453.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,411.10 : 1,019,008.22 = 398,879.35 : x
  2. Step 2: Convert to fraction form
    738,411.10/1,019,008.22 = 398,879.35/x
  3. Step 3: Cross multiply
    738,411.10x = 1,019,008.22 × 398,879.35
  4. Step 4: Simplify right side
    738,411.10x = 406,461,334,887.94
  5. Step 5: Solve for x
    x = 406,461,334,887.94/738,411.10
  6. Step 6: Final answer
    x = 550,453.99

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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.