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Finding the Fourth Proportional to 720,755.36, 994,670.40 and 478,620.40

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Solution

The fourth proportional to 720,755.36, 994,670.40 and 478,620.40 is: 660,514.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,755.36 : 994,670.40 = 478,620.40 : x
  2. Step 2: Convert to fraction form
    720,755.36/994,670.40 = 478,620.40/x
  3. Step 3: Cross multiply
    720,755.36x = 994,670.40 × 478,620.40
  4. Step 4: Simplify right side
    720,755.36x = 476,069,544,716.16
  5. Step 5: Solve for x
    x = 476,069,544,716.16/720,755.36
  6. Step 6: Final answer
    x = 660,514.75

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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.