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Finding the Fourth Proportional to 661,424.32, 911,145.44 and 479,601.92

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Solution

The fourth proportional to 661,424.32, 911,145.44 and 479,601.92 is: 660,675.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,424.32 : 911,145.44 = 479,601.92 : x
  2. Step 2: Convert to fraction form
    661,424.32/911,145.44 = 479,601.92/x
  3. Step 3: Cross multiply
    661,424.32x = 911,145.44 × 479,601.92
  4. Step 4: Simplify right side
    661,424.32x = 436,987,102,423.25
  5. Step 5: Solve for x
    x = 436,987,102,423.25/661,424.32
  6. Step 6: Final answer
    x = 660,675.89

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Double scale
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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.