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Finding the Fourth Proportional to 427,521.60, 641,282.40 and 112,010.40

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Solution

The fourth proportional to 427,521.60, 641,282.40 and 112,010.40 is: 168,015.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,521.60 : 641,282.40 = 112,010.40 : x
  2. Step 2: Convert to fraction form
    427,521.60/641,282.40 = 112,010.40/x
  3. Step 3: Cross multiply
    427,521.60x = 641,282.40 × 112,010.40
  4. Step 4: Simplify right side
    427,521.60x = 71,830,298,136.96
  5. Step 5: Solve for x
    x = 71,830,298,136.96/427,521.60
  6. Step 6: Final answer
    x = 168,015.60

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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.