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Finding the Fourth Proportional to 298,854.78, 448,037.88 and 139,030.34

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Solution

The fourth proportional to 298,854.78, 448,037.88 and 139,030.34 is: 208,431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,854.78 : 448,037.88 = 139,030.34 : x
  2. Step 2: Convert to fraction form
    298,854.78/448,037.88 = 139,030.34/x
  3. Step 3: Cross multiply
    298,854.78x = 448,037.88 × 139,030.34
  4. Step 4: Simplify right side
    298,854.78x = 62,290,859,329.98
  5. Step 5: Solve for x
    x = 62,290,859,329.98/298,854.78
  6. Step 6: Final answer
    x = 208,431.86

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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.