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Finding the Fourth Proportional to 520,852.20, 781,351.20 and 221,330.40

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Solution

The fourth proportional to 520,852.20, 781,351.20 and 221,330.40 is: 332,026.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,852.20 : 781,351.20 = 221,330.40 : x
  2. Step 2: Convert to fraction form
    520,852.20/781,351.20 = 221,330.40/x
  3. Step 3: Cross multiply
    520,852.20x = 781,351.20 × 221,330.40
  4. Step 4: Simplify right side
    520,852.20x = 172,936,773,636.48
  5. Step 5: Solve for x
    x = 172,936,773,636.48/520,852.20
  6. Step 6: Final answer
    x = 332,026.58

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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.