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Finding the Fourth Proportional to 515,126.62, 710,880.60 and 285,688.45

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Solution

The fourth proportional to 515,126.62, 710,880.60 and 285,688.45 is: 394,253.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,126.62 : 710,880.60 = 285,688.45 : x
  2. Step 2: Convert to fraction form
    515,126.62/710,880.60 = 285,688.45/x
  3. Step 3: Cross multiply
    515,126.62x = 710,880.60 × 285,688.45
  4. Step 4: Simplify right side
    515,126.62x = 203,090,376,749.07
  5. Step 5: Solve for x
    x = 203,090,376,749.07/515,126.62
  6. Step 6: Final answer
    x = 394,253.31

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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.