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Finding the Fourth Proportional to 306,649.76, 423,173.42 and 170,681.54

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Solution

The fourth proportional to 306,649.76, 423,173.42 and 170,681.54 is: 235,538.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,649.76 : 423,173.42 = 170,681.54 : x
  2. Step 2: Convert to fraction form
    306,649.76/423,173.42 = 170,681.54/x
  3. Step 3: Cross multiply
    306,649.76x = 423,173.42 × 170,681.54
  4. Step 4: Simplify right side
    306,649.76x = 72,227,888,043.39
  5. Step 5: Solve for x
    x = 72,227,888,043.39/306,649.76
  6. Step 6: Final answer
    x = 235,538.71

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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.