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Finding the Fourth Proportional to 713,640.47, 984,837.38 and 391,331.34

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Solution

The fourth proportional to 713,640.47, 984,837.38 and 391,331.34 is: 540,044.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,640.47 : 984,837.38 = 391,331.34 : x
  2. Step 2: Convert to fraction form
    713,640.47/984,837.38 = 391,331.34/x
  3. Step 3: Cross multiply
    713,640.47x = 984,837.38 × 391,331.34
  4. Step 4: Simplify right side
    713,640.47x = 385,397,729,640.83
  5. Step 5: Solve for x
    x = 385,397,729,640.83/713,640.47
  6. Step 6: Final answer
    x = 540,044.67

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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.