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Finding the Fourth Proportional to 307,419.36, 424,239.47 and 171,462.11

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Solution

The fourth proportional to 307,419.36, 424,239.47 and 171,462.11 is: 236,618.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,419.36 : 424,239.47 = 171,462.11 : x
  2. Step 2: Convert to fraction form
    307,419.36/424,239.47 = 171,462.11/x
  3. Step 3: Cross multiply
    307,419.36x = 424,239.47 × 171,462.11
  4. Step 4: Simplify right side
    307,419.36x = 72,740,994,671.48
  5. Step 5: Solve for x
    x = 72,740,994,671.48/307,419.36
  6. Step 6: Final answer
    x = 236,618.13

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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.