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Finding the Fourth Proportional to 338,444.76, 507,668.34 and 85,725.12

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Solution

The fourth proportional to 338,444.76, 507,668.34 and 85,725.12 is: 128,587.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,444.76 : 507,668.34 = 85,725.12 : x
  2. Step 2: Convert to fraction form
    338,444.76/507,668.34 = 85,725.12/x
  3. Step 3: Cross multiply
    338,444.76x = 507,668.34 × 85,725.12
  4. Step 4: Simplify right side
    338,444.76x = 43,519,929,366.70
  5. Step 5: Solve for x
    x = 43,519,929,366.70/338,444.76
  6. Step 6: Final answer
    x = 128,587.98

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1.5x scale

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.