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Finding the Fourth Proportional to 673,894.32, 929,973.60 and 387,470.40

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Solution

The fourth proportional to 673,894.32, 929,973.60 and 387,470.40 is: 534,708.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,894.32 : 929,973.60 = 387,470.40 : x
  2. Step 2: Convert to fraction form
    673,894.32/929,973.60 = 387,470.40/x
  3. Step 3: Cross multiply
    673,894.32x = 929,973.60 × 387,470.40
  4. Step 4: Simplify right side
    673,894.32x = 360,337,242,781.44
  5. Step 5: Solve for x
    x = 360,337,242,781.44/673,894.32
  6. Step 6: Final answer
    x = 534,708.83

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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.