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Finding the Fourth Proportional to 717,453.32, 990,465.54 and 555,945.80

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Solution

The fourth proportional to 717,453.32, 990,465.54 and 555,945.80 is: 767,499.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,453.32 : 990,465.54 = 555,945.80 : x
  2. Step 2: Convert to fraction form
    717,453.32/990,465.54 = 555,945.80/x
  3. Step 3: Cross multiply
    717,453.32x = 990,465.54 × 555,945.80
  4. Step 4: Simplify right side
    717,453.32x = 550,645,157,007.73
  5. Step 5: Solve for x
    x = 550,645,157,007.73/717,453.32
  6. Step 6: Final answer
    x = 767,499.63

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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.