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Finding the Fourth Proportional to 338,897.80, 508,405.02 and 139,326.76

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Solution

The fourth proportional to 338,897.80, 508,405.02 and 139,326.76 is: 209,014.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,897.80 : 508,405.02 = 139,326.76 : x
  2. Step 2: Convert to fraction form
    338,897.80/508,405.02 = 139,326.76/x
  3. Step 3: Cross multiply
    338,897.80x = 508,405.02 × 139,326.76
  4. Step 4: Simplify right side
    338,897.80x = 70,834,424,204.34
  5. Step 5: Solve for x
    x = 70,834,424,204.34/338,897.80
  6. Step 6: Final answer
    x = 209,014.12

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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.