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Finding the Fourth Proportional to 515,425.10, 711,325.59 and 286,025.81

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Solution

The fourth proportional to 515,425.10, 711,325.59 and 286,025.81 is: 394,737.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,425.10 : 711,325.59 = 286,025.81 : x
  2. Step 2: Convert to fraction form
    515,425.10/711,325.59 = 286,025.81/x
  3. Step 3: Cross multiply
    515,425.10x = 711,325.59 × 286,025.81
  4. Step 4: Simplify right side
    515,425.10x = 203,457,474,496.85
  5. Step 5: Solve for x
    x = 203,457,474,496.85/515,425.10
  6. Step 6: Final answer
    x = 394,737.23

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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.