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Finding the Fourth Proportional to 299,347.11, 448,663.59 and 139,206.87

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Solution

The fourth proportional to 299,347.11, 448,663.59 and 139,206.87 is: 208,644.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,347.11 : 448,663.59 = 139,206.87 : x
  2. Step 2: Convert to fraction form
    299,347.11/448,663.59 = 139,206.87/x
  3. Step 3: Cross multiply
    299,347.11x = 448,663.59 × 139,206.87
  4. Step 4: Simplify right side
    299,347.11x = 62,457,054,046.86
  5. Step 5: Solve for x
    x = 62,457,054,046.86/299,347.11
  6. Step 6: Final answer
    x = 208,644.25

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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.