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Finding the Fourth Proportional to 660,069.10, 990,103.65 and 423,873.10

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Solution

The fourth proportional to 660,069.10, 990,103.65 and 423,873.10 is: 635,809.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,069.10 : 990,103.65 = 423,873.10 : x
  2. Step 2: Convert to fraction form
    660,069.10/990,103.65 = 423,873.10/x
  3. Step 3: Cross multiply
    660,069.10x = 990,103.65 × 423,873.10
  4. Step 4: Simplify right side
    660,069.10x = 419,678,303,446.82
  5. Step 5: Solve for x
    x = 419,678,303,446.82/660,069.10
  6. Step 6: Final answer
    x = 635,809.65

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.