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Finding the Fourth Proportional to 587,051.20, 879,410.40 and 320,334.40

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Solution

The fourth proportional to 587,051.20, 879,410.40 and 320,334.40 is: 479,865.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,051.20 : 879,410.40 = 320,334.40 : x
  2. Step 2: Convert to fraction form
    587,051.20/879,410.40 = 320,334.40/x
  3. Step 3: Cross multiply
    587,051.20x = 879,410.40 × 320,334.40
  4. Step 4: Simplify right side
    587,051.20x = 281,705,402,837.76
  5. Step 5: Solve for x
    x = 281,705,402,837.76/587,051.20
  6. Step 6: Final answer
    x = 479,865.13

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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.