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Finding the Fourth Proportional to 561,374.48, 774,687.66 and 306,720.20

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Solution

The fourth proportional to 561,374.48, 774,687.66 and 306,720.20 is: 423,268.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,374.48 : 774,687.66 = 306,720.20 : x
  2. Step 2: Convert to fraction form
    561,374.48/774,687.66 = 306,720.20/x
  3. Step 3: Cross multiply
    561,374.48x = 774,687.66 × 306,720.20
  4. Step 4: Simplify right side
    561,374.48x = 237,612,354,012.73
  5. Step 5: Solve for x
    x = 237,612,354,012.73/561,374.48
  6. Step 6: Final answer
    x = 423,268.89

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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.