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Finding the Fourth Proportional to 611,195.36, 916,980.74 and 291,754.86

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Solution

The fourth proportional to 611,195.36, 916,980.74 and 291,754.86 is: 437,721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,195.36 : 916,980.74 = 291,754.86 : x
  2. Step 2: Convert to fraction form
    611,195.36/916,980.74 = 291,754.86/x
  3. Step 3: Cross multiply
    611,195.36x = 916,980.74 × 291,754.86
  4. Step 4: Simplify right side
    611,195.36x = 267,533,587,421.40
  5. Step 5: Solve for x
    x = 267,533,587,421.40/611,195.36
  6. Step 6: Final answer
    x = 437,721.89

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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.