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Finding the Fourth Proportional to 673,289.72, 929,476.51 and 418,722.92

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Solution

The fourth proportional to 673,289.72, 929,476.51 and 418,722.92 is: 578,047.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,289.72 : 929,476.51 = 418,722.92 : x
  2. Step 2: Convert to fraction form
    673,289.72/929,476.51 = 418,722.92/x
  3. Step 3: Cross multiply
    673,289.72x = 929,476.51 × 418,722.92
  4. Step 4: Simplify right side
    673,289.72x = 389,193,112,644.42
  5. Step 5: Solve for x
    x = 389,193,112,644.42/673,289.72
  6. Step 6: Final answer
    x = 578,047.02

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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.