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Finding the Fourth Proportional to 720,796.52, 994,669.86 and 398,486.12

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Solution

The fourth proportional to 720,796.52, 994,669.86 and 398,486.12 is: 549,894.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,796.52 : 994,669.86 = 398,486.12 : x
  2. Step 2: Convert to fraction form
    720,796.52/994,669.86 = 398,486.12/x
  3. Step 3: Cross multiply
    720,796.52x = 994,669.86 × 398,486.12
  4. Step 4: Simplify right side
    720,796.52x = 396,362,133,192.34
  5. Step 5: Solve for x
    x = 396,362,133,192.34/720,796.52
  6. Step 6: Final answer
    x = 549,894.63

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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.