Home / 738,347.45-1,018,919.87-398,815.70

Finding the Fourth Proportional to 738,347.45, 1,018,919.87 and 398,815.70

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Solution

The fourth proportional to 738,347.45, 1,018,919.87 and 398,815.70 is: 550,365.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,347.45 : 1,018,919.87 = 398,815.70 : x
  2. Step 2: Convert to fraction form
    738,347.45/1,018,919.87 = 398,815.70/x
  3. Step 3: Cross multiply
    738,347.45x = 1,018,919.87 × 398,815.70
  4. Step 4: Simplify right side
    738,347.45x = 406,361,234,109.28
  5. Step 5: Solve for x
    x = 406,361,234,109.28/738,347.45
  6. Step 6: Final answer
    x = 550,365.87

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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.