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Finding the Fourth Proportional to 899,195.91, 1,240,875.90 and 491,289

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Solution

The fourth proportional to 899,195.91, 1,240,875.90 and 491,289 is: 677,970.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    899,195.91 : 1,240,875.90 = 491,289 : x
  2. Step 2: Convert to fraction form
    899,195.91/1,240,875.90 = 491,289/x
  3. Step 3: Cross multiply
    899,195.91x = 1,240,875.90 × 491,289
  4. Step 4: Simplify right side
    899,195.91x = 609,628,680,035.10
  5. Step 5: Solve for x
    x = 609,628,680,035.10/899,195.91
  6. Step 6: Final answer
    x = 677,970.92

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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.