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Finding the Fourth Proportional to 720,887.49, 994,754.60 and 398,553.45

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Solution

The fourth proportional to 720,887.49, 994,754.60 and 398,553.45 is: 549,964.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,887.49 : 994,754.60 = 398,553.45 : x
  2. Step 2: Convert to fraction form
    720,887.49/994,754.60 = 398,553.45/x
  3. Step 3: Cross multiply
    720,887.49x = 994,754.60 × 398,553.45
  4. Step 4: Simplify right side
    720,887.49x = 396,462,875,740.60
  5. Step 5: Solve for x
    x = 396,462,875,740.60/720,887.49
  6. Step 6: Final answer
    x = 549,964.98

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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.