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Finding the Fourth Proportional to 307,988.91, 425,015.93 and 172,018.87

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Solution

The fourth proportional to 307,988.91, 425,015.93 and 172,018.87 is: 237,381.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,988.91 : 425,015.93 = 172,018.87 : x
  2. Step 2: Convert to fraction form
    307,988.91/425,015.93 = 172,018.87/x
  3. Step 3: Cross multiply
    307,988.91x = 425,015.93 × 172,018.87
  4. Step 4: Simplify right side
    307,988.91x = 73,110,757,885.52
  5. Step 5: Solve for x
    x = 73,110,757,885.52/307,988.91
  6. Step 6: Final answer
    x = 237,381.14

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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.