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Finding the Fourth Proportional to 905,574.70, 1,358,362.05 and 407,910.70

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Solution

The fourth proportional to 905,574.70, 1,358,362.05 and 407,910.70 is: 611,866.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,574.70 : 1,358,362.05 = 407,910.70 : x
  2. Step 2: Convert to fraction form
    905,574.70/1,358,362.05 = 407,910.70/x
  3. Step 3: Cross multiply
    905,574.70x = 1,358,362.05 × 407,910.70
  4. Step 4: Simplify right side
    905,574.70x = 554,090,414,668.94
  5. Step 5: Solve for x
    x = 554,090,414,668.94/905,574.70
  6. Step 6: Final answer
    x = 611,866.05

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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.