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Finding the Fourth Proportional to 520,197.60, 780,296.40 and 146,220.60

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Solution

The fourth proportional to 520,197.60, 780,296.40 and 146,220.60 is: 219,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,197.60 : 780,296.40 = 146,220.60 : x
  2. Step 2: Convert to fraction form
    520,197.60/780,296.40 = 146,220.60/x
  3. Step 3: Cross multiply
    520,197.60x = 780,296.40 × 146,220.60
  4. Step 4: Simplify right side
    520,197.60x = 114,095,407,785.84
  5. Step 5: Solve for x
    x = 114,095,407,785.84/520,197.60
  6. Step 6: Final answer
    x = 219,330.90

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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.