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Finding the Fourth Proportional to 307,389.60, 424,189.20 and 171,427.68

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Solution

The fourth proportional to 307,389.60, 424,189.20 and 171,427.68 is: 236,565.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,389.60 : 424,189.20 = 171,427.68 : x
  2. Step 2: Convert to fraction form
    307,389.60/424,189.20 = 171,427.68/x
  3. Step 3: Cross multiply
    307,389.60x = 424,189.20 × 171,427.68
  4. Step 4: Simplify right side
    307,389.60x = 72,717,770,437.06
  5. Step 5: Solve for x
    x = 72,717,770,437.06/307,389.60
  6. Step 6: Final answer
    x = 236,565.49

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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.