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Finding the Fourth Proportional to 206,885.60, 310,328.40 and 185,890.40

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Solution

The fourth proportional to 206,885.60, 310,328.40 and 185,890.40 is: 278,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,885.60 : 310,328.40 = 185,890.40 : x
  2. Step 2: Convert to fraction form
    206,885.60/310,328.40 = 185,890.40/x
  3. Step 3: Cross multiply
    206,885.60x = 310,328.40 × 185,890.40
  4. Step 4: Simplify right side
    206,885.60x = 57,687,070,407.36
  5. Step 5: Solve for x
    x = 57,687,070,407.36/206,885.60
  6. Step 6: Final answer
    x = 278,835.60

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1.5x scale

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.