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Finding the Fourth Proportional to 399,392.10, 550,848.60 and 256,165.20

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Solution

The fourth proportional to 399,392.10, 550,848.60 and 256,165.20 is: 353,307.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,392.10 : 550,848.60 = 256,165.20 : x
  2. Step 2: Convert to fraction form
    399,392.10/550,848.60 = 256,165.20/x
  3. Step 3: Cross multiply
    399,392.10x = 550,848.60 × 256,165.20
  4. Step 4: Simplify right side
    399,392.10x = 141,108,241,788.72
  5. Step 5: Solve for x
    x = 141,108,241,788.72/399,392.10
  6. Step 6: Final answer
    x = 353,307.54

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1.5x scale

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.