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Finding the Fourth Proportional to 561,333.78, 774,631.17 and 306,687.06

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Solution

The fourth proportional to 561,333.78, 774,631.17 and 306,687.06 is: 423,222.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,333.78 : 774,631.17 = 306,687.06 : x
  2. Step 2: Convert to fraction form
    561,333.78/774,631.17 = 306,687.06/x
  3. Step 3: Cross multiply
    561,333.78x = 774,631.17 × 306,687.06
  4. Step 4: Simplify right side
    561,333.78x = 237,569,356,111.66
  5. Step 5: Solve for x
    x = 237,569,356,111.66/561,333.78
  6. Step 6: Final answer
    x = 423,222.98

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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.