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Finding the Fourth Proportional to 716,051.48, 988,158.30 and 393,763.96

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Solution

The fourth proportional to 716,051.48, 988,158.30 and 393,763.96 is: 543,398.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,051.48 : 988,158.30 = 393,763.96 : x
  2. Step 2: Convert to fraction form
    716,051.48/988,158.30 = 393,763.96/x
  3. Step 3: Cross multiply
    716,051.48x = 988,158.30 × 393,763.96
  4. Step 4: Simplify right side
    716,051.48x = 389,101,125,314.87
  5. Step 5: Solve for x
    x = 389,101,125,314.87/716,051.48
  6. Step 6: Final answer
    x = 543,398.26

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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.