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Finding the Fourth Proportional to 561,212.40, 774,489.72 and 306,567.76

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Solution

The fourth proportional to 561,212.40, 774,489.72 and 306,567.76 is: 423,072.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,212.40 : 774,489.72 = 306,567.76 : x
  2. Step 2: Convert to fraction form
    561,212.40/774,489.72 = 306,567.76/x
  3. Step 3: Cross multiply
    561,212.40x = 774,489.72 × 306,567.76
  4. Step 4: Simplify right side
    561,212.40x = 237,433,578,603.43
  5. Step 5: Solve for x
    x = 237,433,578,603.43/561,212.40
  6. Step 6: Final answer
    x = 423,072.58

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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.