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Finding the Fourth Proportional to 561,123.70, 774,350.71 and 306,475.50

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Solution

The fourth proportional to 561,123.70, 774,350.71 and 306,475.50 is: 422,936.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,123.70 : 774,350.71 = 306,475.50 : x
  2. Step 2: Convert to fraction form
    561,123.70/774,350.71 = 306,475.50/x
  3. Step 3: Cross multiply
    561,123.70x = 774,350.71 × 306,475.50
  4. Step 4: Simplify right side
    561,123.70x = 237,319,519,666.47
  5. Step 5: Solve for x
    x = 237,319,519,666.47/561,123.70
  6. Step 6: Final answer
    x = 422,936.19

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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.