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Finding the Fourth Proportional to 890,643.60, 1,336,800.60 and 470,221.20

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Solution

The fourth proportional to 890,643.60, 1,336,800.60 and 470,221.20 is: 705,772.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,643.60 : 1,336,800.60 = 470,221.20 : x
  2. Step 2: Convert to fraction form
    890,643.60/1,336,800.60 = 470,221.20/x
  3. Step 3: Cross multiply
    890,643.60x = 1,336,800.60 × 470,221.20
  4. Step 4: Simplify right side
    890,643.60x = 628,591,982,292.72
  5. Step 5: Solve for x
    x = 628,591,982,292.72/890,643.60
  6. Step 6: Final answer
    x = 705,772.75

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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.