Home / 738,180.47-1,018,689.05-398,648.72

Finding the Fourth Proportional to 738,180.47, 1,018,689.05 and 398,648.72

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Solution

The fourth proportional to 738,180.47, 1,018,689.05 and 398,648.72 is: 550,135.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,180.47 : 1,018,689.05 = 398,648.72 : x
  2. Step 2: Convert to fraction form
    738,180.47/1,018,689.05 = 398,648.72/x
  3. Step 3: Cross multiply
    738,180.47x = 1,018,689.05 × 398,648.72
  4. Step 4: Simplify right side
    738,180.47x = 406,099,089,403.86
  5. Step 5: Solve for x
    x = 406,099,089,403.86/738,180.47
  6. Step 6: Final answer
    x = 550,135.24

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Double scale
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Similar ratio
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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.