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Finding the Fourth Proportional to 328,187.60, 492,281.40 and 78,869.60

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Solution

The fourth proportional to 328,187.60, 492,281.40 and 78,869.60 is: 118,304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,187.60 : 492,281.40 = 78,869.60 : x
  2. Step 2: Convert to fraction form
    328,187.60/492,281.40 = 78,869.60/x
  3. Step 3: Cross multiply
    328,187.60x = 492,281.40 × 78,869.60
  4. Step 4: Simplify right side
    328,187.60x = 38,826,037,105.44
  5. Step 5: Solve for x
    x = 38,826,037,105.44/328,187.60
  6. Step 6: Final answer
    x = 118,304.40

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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.