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Finding the Fourth Proportional to 738,410.66, 1,019,007.62 and 398,878.91

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Solution

The fourth proportional to 738,410.66, 1,019,007.62 and 398,878.91 is: 550,453.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,410.66 : 1,019,007.62 = 398,878.91 : x
  2. Step 2: Convert to fraction form
    738,410.66/1,019,007.62 = 398,878.91/x
  3. Step 3: Cross multiply
    738,410.66x = 1,019,007.62 × 398,878.91
  4. Step 4: Simplify right side
    738,410.66x = 406,460,648,747.29
  5. Step 5: Solve for x
    x = 406,460,648,747.29/738,410.66
  6. Step 6: Final answer
    x = 550,453.39

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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.