Home / 990,108-1,366,235.40-554,464.56

Finding the Fourth Proportional to 990,108, 1,366,235.40 and 554,464.56

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Solution

The fourth proportional to 990,108, 1,366,235.40 and 554,464.56 is: 765,097.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,108 : 1,366,235.40 = 554,464.56 : x
  2. Step 2: Convert to fraction form
    990,108/1,366,235.40 = 554,464.56/x
  3. Step 3: Cross multiply
    990,108x = 1,366,235.40 × 554,464.56
  4. Step 4: Simplify right side
    990,108x = 757,529,109,917.42
  5. Step 5: Solve for x
    x = 757,529,109,917.42/990,108
  6. Step 6: Final answer
    x = 765,097.45

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Half scale
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Double scale
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Similar ratio
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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.