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Finding the Fourth Proportional to 660,300.30, 990,450.45 and 393,923.70

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Solution

The fourth proportional to 660,300.30, 990,450.45 and 393,923.70 is: 590,885.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,300.30 : 990,450.45 = 393,923.70 : x
  2. Step 2: Convert to fraction form
    660,300.30/990,450.45 = 393,923.70/x
  3. Step 3: Cross multiply
    660,300.30x = 990,450.45 × 393,923.70
  4. Step 4: Simplify right side
    660,300.30x = 390,161,905,930.67
  5. Step 5: Solve for x
    x = 390,161,905,930.67/660,300.30
  6. Step 6: Final answer
    x = 590,885.55

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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.