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Finding the Fourth Proportional to 738,387, 1,018,974.60 and 398,855.25

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Solution

The fourth proportional to 738,387, 1,018,974.60 and 398,855.25 is: 550,420.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,387 : 1,018,974.60 = 398,855.25 : x
  2. Step 2: Convert to fraction form
    738,387/1,018,974.60 = 398,855.25/x
  3. Step 3: Cross multiply
    738,387x = 1,018,974.60 × 398,855.25
  4. Step 4: Simplify right side
    738,387x = 406,423,368,826.65
  5. Step 5: Solve for x
    x = 406,423,368,826.65/738,387
  6. Step 6: Final answer
    x = 550,420.54

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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.