Home / 738,397.50-1,018,989.12-398,865.78

Finding the Fourth Proportional to 738,397.50, 1,018,989.12 and 398,865.78

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Solution

The fourth proportional to 738,397.50, 1,018,989.12 and 398,865.78 is: 550,435.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,397.50 : 1,018,989.12 = 398,865.78 : x
  2. Step 2: Convert to fraction form
    738,397.50/1,018,989.12 = 398,865.78/x
  3. Step 3: Cross multiply
    738,397.50x = 1,018,989.12 × 398,865.78
  4. Step 4: Simplify right side
    738,397.50x = 406,439,890,160.31
  5. Step 5: Solve for x
    x = 406,439,890,160.31/738,397.50
  6. Step 6: Final answer
    x = 550,435.08

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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.