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Finding the Fourth Proportional to 386,176.72, 579,263.90 and 97,987.80

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Solution

The fourth proportional to 386,176.72, 579,263.90 and 97,987.80 is: 146,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,176.72 : 579,263.90 = 97,987.80 : x
  2. Step 2: Convert to fraction form
    386,176.72/579,263.90 = 97,987.80/x
  3. Step 3: Cross multiply
    386,176.72x = 579,263.90 × 97,987.80
  4. Step 4: Simplify right side
    386,176.72x = 56,760,795,180.42
  5. Step 5: Solve for x
    x = 56,760,795,180.42/386,176.72
  6. Step 6: Final answer
    x = 146,981.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.