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Finding the Fourth Proportional to 552,437.91, 761,931.21 and 378,111.43

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Solution

The fourth proportional to 552,437.91, 761,931.21 and 378,111.43 is: 521,497.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,437.91 : 761,931.21 = 378,111.43 : x
  2. Step 2: Convert to fraction form
    552,437.91/761,931.21 = 378,111.43/x
  3. Step 3: Cross multiply
    552,437.91x = 761,931.21 × 378,111.43
  4. Step 4: Simplify right side
    552,437.91x = 288,094,899,374.73
  5. Step 5: Solve for x
    x = 288,094,899,374.73/552,437.91
  6. Step 6: Final answer
    x = 521,497.34

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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.