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Finding the Fourth Proportional to 561,378.48, 774,693.18 and 306,724.20

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Solution

The fourth proportional to 561,378.48, 774,693.18 and 306,724.20 is: 423,274.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,378.48 : 774,693.18 = 306,724.20 : x
  2. Step 2: Convert to fraction form
    561,378.48/774,693.18 = 306,724.20/x
  3. Step 3: Cross multiply
    561,378.48x = 774,693.18 × 306,724.20
  4. Step 4: Simplify right side
    561,378.48x = 237,617,145,880.96
  5. Step 5: Solve for x
    x = 237,617,145,880.96/561,378.48
  6. Step 6: Final answer
    x = 423,274.41

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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.