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Finding the Fourth Proportional to 693,346.32, 956,721.60 and 387,384.48

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Solution

The fourth proportional to 693,346.32, 956,721.60 and 387,384.48 is: 534,536.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,346.32 : 956,721.60 = 387,384.48 : x
  2. Step 2: Convert to fraction form
    693,346.32/956,721.60 = 387,384.48/x
  3. Step 3: Cross multiply
    693,346.32x = 956,721.60 × 387,384.48
  4. Step 4: Simplify right side
    693,346.32x = 370,619,099,520.77
  5. Step 5: Solve for x
    x = 370,619,099,520.77/693,346.32
  6. Step 6: Final answer
    x = 534,536.77

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Double scale
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Similar ratio
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1.5x scale

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.