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Finding the Fourth Proportional to 561,087.79, 774,300.12 and 306,438.91

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Solution

The fourth proportional to 561,087.79, 774,300.12 and 306,438.91 is: 422,885.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,087.79 : 774,300.12 = 306,438.91 : x
  2. Step 2: Convert to fraction form
    561,087.79/774,300.12 = 306,438.91/x
  3. Step 3: Cross multiply
    561,087.79x = 774,300.12 × 306,438.91
  4. Step 4: Simplify right side
    561,087.79x = 237,275,684,785.67
  5. Step 5: Solve for x
    x = 237,275,684,785.67/561,087.79
  6. Step 6: Final answer
    x = 422,885.13

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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.