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Finding the Fourth Proportional to 299,287.72, 448,678.76 and 139,281.10

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Solution

The fourth proportional to 299,287.72, 448,678.76 and 139,281.10 is: 208,803.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,287.72 : 448,678.76 = 139,281.10 : x
  2. Step 2: Convert to fraction form
    299,287.72/448,678.76 = 139,281.10/x
  3. Step 3: Cross multiply
    299,287.72x = 448,678.76 × 139,281.10
  4. Step 4: Simplify right side
    299,287.72x = 62,492,469,421.33
  5. Step 5: Solve for x
    x = 62,492,469,421.33/299,287.72
  6. Step 6: Final answer
    x = 208,803.99

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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.