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Finding the Fourth Proportional to 561,521.57, 774,953.19 and 306,911.03

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Solution

The fourth proportional to 561,521.57, 774,953.19 and 306,911.03 is: 423,566.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,521.57 : 774,953.19 = 306,911.03 : x
  2. Step 2: Convert to fraction form
    561,521.57/774,953.19 = 306,911.03/x
  3. Step 3: Cross multiply
    561,521.57x = 774,953.19 × 306,911.03
  4. Step 4: Simplify right side
    561,521.57x = 237,841,677,869.92
  5. Step 5: Solve for x
    x = 237,841,677,869.92/561,521.57
  6. Step 6: Final answer
    x = 423,566.42

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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.