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Finding the Fourth Proportional to 673,458.90, 929,532.36 and 387,145.08

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Solution

The fourth proportional to 673,458.90, 929,532.36 and 387,145.08 is: 534,351.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,458.90 : 929,532.36 = 387,145.08 : x
  2. Step 2: Convert to fraction form
    673,458.90/929,532.36 = 387,145.08/x
  3. Step 3: Cross multiply
    673,458.90x = 929,532.36 × 387,145.08
  4. Step 4: Simplify right side
    673,458.90x = 359,863,879,874.79
  5. Step 5: Solve for x
    x = 359,863,879,874.79/673,458.90
  6. Step 6: Final answer
    x = 534,351.66

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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.