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Finding the Fourth Proportional to 285,015.40, 427,523.10 and 74,674.60

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Solution

The fourth proportional to 285,015.40, 427,523.10 and 74,674.60 is: 112,011.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,015.40 : 427,523.10 = 74,674.60 : x
  2. Step 2: Convert to fraction form
    285,015.40/427,523.10 = 74,674.60/x
  3. Step 3: Cross multiply
    285,015.40x = 427,523.10 × 74,674.60
  4. Step 4: Simplify right side
    285,015.40x = 31,925,116,483.26
  5. Step 5: Solve for x
    x = 31,925,116,483.26/285,015.40
  6. Step 6: Final answer
    x = 112,011.90

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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.