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Finding the Fourth Proportional to 561,539.76, 774,922.98 and 306,890.88

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Solution

The fourth proportional to 561,539.76, 774,922.98 and 306,890.88 is: 423,508.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,539.76 : 774,922.98 = 306,890.88 : x
  2. Step 2: Convert to fraction form
    561,539.76/774,922.98 = 306,890.88/x
  3. Step 3: Cross multiply
    561,539.76x = 774,922.98 × 306,890.88
  4. Step 4: Simplify right side
    561,539.76x = 237,816,795,264.42
  5. Step 5: Solve for x
    x = 237,816,795,264.42/561,539.76
  6. Step 6: Final answer
    x = 423,508.38

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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.