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Finding the Fourth Proportional to 716,125.74, 988,233.78 and 393,835.83

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Solution

The fourth proportional to 716,125.74, 988,233.78 and 393,835.83 is: 543,482.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,125.74 : 988,233.78 = 393,835.83 : x
  2. Step 2: Convert to fraction form
    716,125.74/988,233.78 = 393,835.83/x
  3. Step 3: Cross multiply
    716,125.74x = 988,233.78 × 393,835.83
  4. Step 4: Simplify right side
    716,125.74x = 389,201,870,980.34
  5. Step 5: Solve for x
    x = 389,201,870,980.34/716,125.74
  6. Step 6: Final answer
    x = 543,482.59

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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.