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Finding the Fourth Proportional to 611,064.72, 843,370.65 and 356,415.89

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Solution

The fourth proportional to 611,064.72, 843,370.65 and 356,415.89 is: 491,913.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,064.72 : 843,370.65 = 356,415.89 : x
  2. Step 2: Convert to fraction form
    611,064.72/843,370.65 = 356,415.89/x
  3. Step 3: Cross multiply
    611,064.72x = 843,370.65 × 356,415.89
  4. Step 4: Simplify right side
    611,064.72x = 300,590,696,602.78
  5. Step 5: Solve for x
    x = 300,590,696,602.78/611,064.72
  6. Step 6: Final answer
    x = 491,913.03

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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.