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Finding the Fourth Proportional to 660,068.10, 990,102.15 and 423,872.10

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Solution

The fourth proportional to 660,068.10, 990,102.15 and 423,872.10 is: 635,808.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,068.10 : 990,102.15 = 423,872.10 : x
  2. Step 2: Convert to fraction form
    660,068.10/990,102.15 = 423,872.10/x
  3. Step 3: Cross multiply
    660,068.10x = 990,102.15 × 423,872.10
  4. Step 4: Simplify right side
    660,068.10x = 419,676,677,535.02
  5. Step 5: Solve for x
    x = 419,676,677,535.02/660,068.10
  6. Step 6: Final answer
    x = 635,808.15

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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.