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Finding the Fourth Proportional to 720,784.07, 994,702.78 and 398,514.97

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Solution

The fourth proportional to 720,784.07, 994,702.78 and 398,514.97 is: 549,962.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,784.07 : 994,702.78 = 398,514.97 : x
  2. Step 2: Convert to fraction form
    720,784.07/994,702.78 = 398,514.97/x
  3. Step 3: Cross multiply
    720,784.07x = 994,702.78 × 398,514.97
  4. Step 4: Simplify right side
    720,784.07x = 396,403,947,534.33
  5. Step 5: Solve for x
    x = 396,403,947,534.33/720,784.07
  6. Step 6: Final answer
    x = 549,962.14

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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.