Home / 716,025.18-988,140.10-393,759.78

Finding the Fourth Proportional to 716,025.18, 988,140.10 and 393,759.78

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Solution

The fourth proportional to 716,025.18, 988,140.10 and 393,759.78 is: 543,402.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,025.18 : 988,140.10 = 393,759.78 : x
  2. Step 2: Convert to fraction form
    716,025.18/988,140.10 = 393,759.78/x
  3. Step 3: Cross multiply
    716,025.18x = 988,140.10 × 393,759.78
  4. Step 4: Simplify right side
    716,025.18x = 389,089,828,385.18
  5. Step 5: Solve for x
    x = 389,089,828,385.18/716,025.18
  6. Step 6: Final answer
    x = 543,402.44

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Double scale
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Similar ratio
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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.