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Finding the Fourth Proportional to 520,305, 780,439.64 and 220,592.58

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Solution

The fourth proportional to 520,305, 780,439.64 and 220,592.58 is: 330,881.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,305 : 780,439.64 = 220,592.58 : x
  2. Step 2: Convert to fraction form
    520,305/780,439.64 = 220,592.58/x
  3. Step 3: Cross multiply
    520,305x = 780,439.64 × 220,592.58
  4. Step 4: Simplify right side
    520,305x = 172,159,193,721.87
  5. Step 5: Solve for x
    x = 172,159,193,721.87/520,305
  6. Step 6: Final answer
    x = 330,881.30

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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.