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Finding the Fourth Proportional to 665,325.17, 917,859.04 and 407,213.61

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Solution

The fourth proportional to 665,325.17, 917,859.04 and 407,213.61 is: 561,777.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,325.17 : 917,859.04 = 407,213.61 : x
  2. Step 2: Convert to fraction form
    665,325.17/917,859.04 = 407,213.61/x
  3. Step 3: Cross multiply
    665,325.17x = 917,859.04 × 407,213.61
  4. Step 4: Simplify right side
    665,325.17x = 373,764,690,980.11
  5. Step 5: Solve for x
    x = 373,764,690,980.11/665,325.17
  6. Step 6: Final answer
    x = 561,777.47

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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.