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Finding the Fourth Proportional to 716,125.68, 988,233.72 and 393,835.79

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Solution

The fourth proportional to 716,125.68, 988,233.72 and 393,835.79 is: 543,482.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,125.68 : 988,233.72 = 393,835.79 : x
  2. Step 2: Convert to fraction form
    716,125.68/988,233.72 = 393,835.79/x
  3. Step 3: Cross multiply
    716,125.68x = 988,233.72 × 393,835.79
  4. Step 4: Simplify right side
    716,125.68x = 389,201,802,879.67
  5. Step 5: Solve for x
    x = 389,201,802,879.67/716,125.68
  6. Step 6: Final answer
    x = 543,482.54

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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.