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Finding the Fourth Proportional to 660,072.04, 990,107.96 and 424,909.40

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Solution

The fourth proportional to 660,072.04, 990,107.96 and 424,909.40 is: 637,364.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,072.04 : 990,107.96 = 424,909.40 : x
  2. Step 2: Convert to fraction form
    660,072.04/990,107.96 = 424,909.40/x
  3. Step 3: Cross multiply
    660,072.04x = 990,107.96 × 424,909.40
  4. Step 4: Simplify right side
    660,072.04x = 420,706,172,143.74
  5. Step 5: Solve for x
    x = 420,706,172,143.74/660,072.04
  6. Step 6: Final answer
    x = 637,364.03

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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.