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Finding the Fourth Proportional to 338,931.60, 508,251.60 and 170,386.80

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Solution

The fourth proportional to 338,931.60, 508,251.60 and 170,386.80 is: 255,506.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,931.60 : 508,251.60 = 170,386.80 : x
  2. Step 2: Convert to fraction form
    338,931.60/508,251.60 = 170,386.80/x
  3. Step 3: Cross multiply
    338,931.60x = 508,251.60 × 170,386.80
  4. Step 4: Simplify right side
    338,931.60x = 86,599,363,718.88
  5. Step 5: Solve for x
    x = 86,599,363,718.88/338,931.60
  6. Step 6: Final answer
    x = 255,506.90

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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.