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Finding the Fourth Proportional to 515,648.70, 711,580.68 and 283,075.56

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Solution

The fourth proportional to 515,648.70, 711,580.68 and 283,075.56 is: 390,636.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,648.70 : 711,580.68 = 283,075.56 : x
  2. Step 2: Convert to fraction form
    515,648.70/711,580.68 = 283,075.56/x
  3. Step 3: Cross multiply
    515,648.70x = 711,580.68 × 283,075.56
  4. Step 4: Simplify right side
    515,648.70x = 201,431,099,476.18
  5. Step 5: Solve for x
    x = 201,431,099,476.18/515,648.70
  6. Step 6: Final answer
    x = 390,636.30

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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.