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Finding the Fourth Proportional to 611,507.40, 843,818.61 and 357,006.21

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Solution

The fourth proportional to 611,507.40, 843,818.61 and 357,006.21 is: 492,632.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,507.40 : 843,818.61 = 357,006.21 : x
  2. Step 2: Convert to fraction form
    611,507.40/843,818.61 = 357,006.21/x
  3. Step 3: Cross multiply
    611,507.40x = 843,818.61 × 357,006.21
  4. Step 4: Simplify right side
    611,507.40x = 301,248,483,883.57
  5. Step 5: Solve for x
    x = 301,248,483,883.57/611,507.40
  6. Step 6: Final answer
    x = 492,632.61

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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.