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Finding the Fourth Proportional to 306,620, 423,142.08 and 172,484

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Solution

The fourth proportional to 306,620, 423,142.08 and 172,484 is: 238,031.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,620 : 423,142.08 = 172,484 : x
  2. Step 2: Convert to fraction form
    306,620/423,142.08 = 172,484/x
  3. Step 3: Cross multiply
    306,620x = 423,142.08 × 172,484
  4. Step 4: Simplify right side
    306,620x = 72,985,238,526.72
  5. Step 5: Solve for x
    x = 72,985,238,526.72/306,620
  6. Step 6: Final answer
    x = 238,031.57

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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.