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Finding the Fourth Proportional to 648,478.60, 972,863.70 and 199,220.20

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Solution

The fourth proportional to 648,478.60, 972,863.70 and 199,220.20 is: 298,875.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,478.60 : 972,863.70 = 199,220.20 : x
  2. Step 2: Convert to fraction form
    648,478.60/972,863.70 = 199,220.20/x
  3. Step 3: Cross multiply
    648,478.60x = 972,863.70 × 199,220.20
  4. Step 4: Simplify right side
    648,478.60x = 193,814,100,886.74
  5. Step 5: Solve for x
    x = 193,814,100,886.74/648,478.60
  6. Step 6: Final answer
    x = 298,875.09

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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.