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Finding the Fourth Proportional to 515,428.84, 711,330.76 and 286,029.56

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Solution

The fourth proportional to 515,428.84, 711,330.76 and 286,029.56 is: 394,742.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,428.84 : 711,330.76 = 286,029.56 : x
  2. Step 2: Convert to fraction form
    515,428.84/711,330.76 = 286,029.56/x
  3. Step 3: Cross multiply
    515,428.84x = 711,330.76 × 286,029.56
  4. Step 4: Simplify right side
    515,428.84x = 203,461,624,297.27
  5. Step 5: Solve for x
    x = 203,461,624,297.27/515,428.84
  6. Step 6: Final answer
    x = 394,742.41

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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.