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Finding the Fourth Proportional to 354,521.60, 531,782.40 and 260,043.20

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Solution

The fourth proportional to 354,521.60, 531,782.40 and 260,043.20 is: 390,064.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,521.60 : 531,782.40 = 260,043.20 : x
  2. Step 2: Convert to fraction form
    354,521.60/531,782.40 = 260,043.20/x
  3. Step 3: Cross multiply
    354,521.60x = 531,782.40 × 260,043.20
  4. Step 4: Simplify right side
    354,521.60x = 138,286,396,999.68
  5. Step 5: Solve for x
    x = 138,286,396,999.68/354,521.60
  6. Step 6: Final answer
    x = 390,064.80

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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.