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Finding the Fourth Proportional to 561,503.88, 774,885.78 and 306,871.56

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Solution

The fourth proportional to 561,503.88, 774,885.78 and 306,871.56 is: 423,488.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,503.88 : 774,885.78 = 306,871.56 : x
  2. Step 2: Convert to fraction form
    561,503.88/774,885.78 = 306,871.56/x
  3. Step 3: Cross multiply
    561,503.88x = 774,885.78 × 306,871.56
  4. Step 4: Simplify right side
    561,503.88x = 237,790,408,130.42
  5. Step 5: Solve for x
    x = 237,790,408,130.42/561,503.88
  6. Step 6: Final answer
    x = 423,488.45

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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.