Home / 716,120.19-988,226.13-393,830.25

Finding the Fourth Proportional to 716,120.19, 988,226.13 and 393,830.25

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Solution

The fourth proportional to 716,120.19, 988,226.13 and 393,830.25 is: 543,474.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,120.19 : 988,226.13 = 393,830.25 : x
  2. Step 2: Convert to fraction form
    716,120.19/988,226.13 = 393,830.25/x
  3. Step 3: Cross multiply
    716,120.19x = 988,226.13 × 393,830.25
  4. Step 4: Simplify right side
    716,120.19x = 389,193,343,834.43
  5. Step 5: Solve for x
    x = 389,193,343,834.43/716,120.19
  6. Step 6: Final answer
    x = 543,474.89

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Half scale
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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.