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Finding the Fourth Proportional to 778,709.80, 1,168,064.70 and 726,221.80

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Solution

The fourth proportional to 778,709.80, 1,168,064.70 and 726,221.80 is: 1,089,332.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,709.80 : 1,168,064.70 = 726,221.80 : x
  2. Step 2: Convert to fraction form
    778,709.80/1,168,064.70 = 726,221.80/x
  3. Step 3: Cross multiply
    778,709.80x = 1,168,064.70 × 726,221.80
  4. Step 4: Simplify right side
    778,709.80x = 848,274,048,950.46
  5. Step 5: Solve for x
    x = 848,274,048,950.46/778,709.80
  6. Step 6: Final answer
    x = 1,089,332.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.