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Finding the Fourth Proportional to 464,419.12, 640,905.60 and 260,515.30

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Solution

The fourth proportional to 464,419.12, 640,905.60 and 260,515.30 is: 359,515.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    464,419.12 : 640,905.60 = 260,515.30 : x
  2. Step 2: Convert to fraction form
    464,419.12/640,905.60 = 260,515.30/x
  3. Step 3: Cross multiply
    464,419.12x = 640,905.60 × 260,515.30
  4. Step 4: Simplify right side
    464,419.12x = 166,965,714,655.68
  5. Step 5: Solve for x
    x = 166,965,714,655.68/464,419.12
  6. Step 6: Final answer
    x = 359,515.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.