Home / 738,401.60-1,018,993.60-398,869.76

Finding the Fourth Proportional to 738,401.60, 1,018,993.60 and 398,869.76

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Solution

The fourth proportional to 738,401.60, 1,018,993.60 and 398,869.76 is: 550,439.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,401.60 : 1,018,993.60 = 398,869.76 : x
  2. Step 2: Convert to fraction form
    738,401.60/1,018,993.60 = 398,869.76/x
  3. Step 3: Cross multiply
    738,401.60x = 1,018,993.60 × 398,869.76
  4. Step 4: Simplify right side
    738,401.60x = 406,445,732,673.54
  5. Step 5: Solve for x
    x = 406,445,732,673.54/738,401.60
  6. Step 6: Final answer
    x = 550,439.94

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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.