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Finding the Fourth Proportional to 665,866.96, 918,679.44 and 407,474.28

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Solution

The fourth proportional to 665,866.96, 918,679.44 and 407,474.28 is: 562,181.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,866.96 : 918,679.44 = 407,474.28 : x
  2. Step 2: Convert to fraction form
    665,866.96/918,679.44 = 407,474.28/x
  3. Step 3: Cross multiply
    665,866.96x = 918,679.44 × 407,474.28
  4. Step 4: Simplify right side
    665,866.96x = 374,338,243,364.80
  5. Step 5: Solve for x
    x = 374,338,243,364.80/665,866.96
  6. Step 6: Final answer
    x = 562,181.74

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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.