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Finding the Fourth Proportional to 899,689.86, 1,241,571.96 and 491,793.42

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Solution

The fourth proportional to 899,689.86, 1,241,571.96 and 491,793.42 is: 678,674.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    899,689.86 : 1,241,571.96 = 491,793.42 : x
  2. Step 2: Convert to fraction form
    899,689.86/1,241,571.96 = 491,793.42/x
  3. Step 3: Cross multiply
    899,689.86x = 1,241,571.96 × 491,793.42
  4. Step 4: Simplify right side
    899,689.86x = 610,596,920,384.50
  5. Step 5: Solve for x
    x = 610,596,920,384.50/899,689.86
  6. Step 6: Final answer
    x = 678,674.89

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Double scale
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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.