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Finding the Fourth Proportional to 561,548.76, 774,935.40 and 306,899.88

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Solution

The fourth proportional to 561,548.76, 774,935.40 and 306,899.88 is: 423,520.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,548.76 : 774,935.40 = 306,899.88 : x
  2. Step 2: Convert to fraction form
    561,548.76/774,935.40 = 306,899.88/x
  3. Step 3: Cross multiply
    561,548.76x = 774,935.40 × 306,899.88
  4. Step 4: Simplify right side
    561,548.76x = 237,827,581,267.75
  5. Step 5: Solve for x
    x = 237,827,581,267.75/561,548.76
  6. Step 6: Final answer
    x = 423,520.80

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Double scale
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Similar ratio
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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.