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Finding the Fourth Proportional to 640,027.40, 960,041.10 and 285,211.40

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Solution

The fourth proportional to 640,027.40, 960,041.10 and 285,211.40 is: 427,817.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,027.40 : 960,041.10 = 285,211.40 : x
  2. Step 2: Convert to fraction form
    640,027.40/960,041.10 = 285,211.40/x
  3. Step 3: Cross multiply
    640,027.40x = 960,041.10 × 285,211.40
  4. Step 4: Simplify right side
    640,027.40x = 273,814,666,188.54
  5. Step 5: Solve for x
    x = 273,814,666,188.54/640,027.40
  6. Step 6: Final answer
    x = 427,817.10

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Similar ratio
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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.