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Finding the Fourth Proportional to 402,630.76, 555,644.75 and 230,579.47

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Solution

The fourth proportional to 402,630.76, 555,644.75 and 230,579.47 is: 318,207.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,630.76 : 555,644.75 = 230,579.47 : x
  2. Step 2: Convert to fraction form
    402,630.76/555,644.75 = 230,579.47/x
  3. Step 3: Cross multiply
    402,630.76x = 555,644.75 × 230,579.47
  4. Step 4: Simplify right side
    402,630.76x = 128,120,271,504.94
  5. Step 5: Solve for x
    x = 128,120,271,504.94/402,630.76
  6. Step 6: Final answer
    x = 318,207.86

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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.