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Finding the Fourth Proportional to 716,100.69, 988,199.24 and 393,810.79

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Solution

The fourth proportional to 716,100.69, 988,199.24 and 393,810.79 is: 543,448.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,100.69 : 988,199.24 = 393,810.79 : x
  2. Step 2: Convert to fraction form
    716,100.69/988,199.24 = 393,810.79/x
  3. Step 3: Cross multiply
    716,100.69x = 988,199.24 × 393,810.79
  4. Step 4: Simplify right side
    716,100.69x = 389,163,521,412.75
  5. Step 5: Solve for x
    x = 389,163,521,412.75/716,100.69
  6. Step 6: Final answer
    x = 543,448.05

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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.