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Finding the Fourth Proportional to 720,783.44, 994,701.92 and 398,514.35

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Solution

The fourth proportional to 720,783.44, 994,701.92 and 398,514.35 is: 549,961.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,783.44 : 994,701.92 = 398,514.35 : x
  2. Step 2: Convert to fraction form
    720,783.44/994,701.92 = 398,514.35/x
  3. Step 3: Cross multiply
    720,783.44x = 994,701.92 × 398,514.35
  4. Step 4: Simplify right side
    720,783.44x = 396,402,982,126.47
  5. Step 5: Solve for x
    x = 396,402,982,126.47/720,783.44
  6. Step 6: Final answer
    x = 549,961.28

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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.