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Finding the Fourth Proportional to 328,459.50, 492,689.25 and 79,141.50

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Solution

The fourth proportional to 328,459.50, 492,689.25 and 79,141.50 is: 118,712.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,459.50 : 492,689.25 = 79,141.50 : x
  2. Step 2: Convert to fraction form
    328,459.50/492,689.25 = 79,141.50/x
  3. Step 3: Cross multiply
    328,459.50x = 492,689.25 × 79,141.50
  4. Step 4: Simplify right side
    328,459.50x = 38,992,166,278.88
  5. Step 5: Solve for x
    x = 38,992,166,278.88/328,459.50
  6. Step 6: Final answer
    x = 118,712.25

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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.