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Finding the Fourth Proportional to 611,444.43, 916,684.29 and 386,330.45

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Solution

The fourth proportional to 611,444.43, 916,684.29 and 386,330.45 is: 579,190.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,444.43 : 916,684.29 = 386,330.45 : x
  2. Step 2: Convert to fraction form
    611,444.43/916,684.29 = 386,330.45/x
  3. Step 3: Cross multiply
    611,444.43x = 916,684.29 × 386,330.45
  4. Step 4: Simplify right side
    611,444.43x = 354,143,049,680.21
  5. Step 5: Solve for x
    x = 354,143,049,680.21/611,444.43
  6. Step 6: Final answer
    x = 579,190.90

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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.