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Finding the Fourth Proportional to 561,381.48, 774,697.32 and 306,727.20

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Solution

The fourth proportional to 561,381.48, 774,697.32 and 306,727.20 is: 423,278.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,381.48 : 774,697.32 = 306,727.20 : x
  2. Step 2: Convert to fraction form
    561,381.48/774,697.32 = 306,727.20/x
  3. Step 3: Cross multiply
    561,381.48x = 774,697.32 × 306,727.20
  4. Step 4: Simplify right side
    561,381.48x = 237,620,739,811.10
  5. Step 5: Solve for x
    x = 237,620,739,811.10/561,381.48
  6. Step 6: Final answer
    x = 423,278.55

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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.