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Finding the Fourth Proportional to 611,134.50, 916,726.32 and 291,121.86

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Solution

The fourth proportional to 611,134.50, 916,726.32 and 291,121.86 is: 436,694.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,134.50 : 916,726.32 = 291,121.86 : x
  2. Step 2: Convert to fraction form
    611,134.50/916,726.32 = 291,121.86/x
  3. Step 3: Cross multiply
    611,134.50x = 916,726.32 × 291,121.86
  4. Step 4: Simplify right side
    611,134.50x = 266,879,071,389.36
  5. Step 5: Solve for x
    x = 266,879,071,389.36/611,134.50
  6. Step 6: Final answer
    x = 436,694.49

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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.