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Finding the Fourth Proportional to 426,574.32, 639,978.36 and 186,644.72

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Solution

The fourth proportional to 426,574.32, 639,978.36 and 186,644.72 is: 280,018.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,574.32 : 639,978.36 = 186,644.72 : x
  2. Step 2: Convert to fraction form
    426,574.32/639,978.36 = 186,644.72/x
  3. Step 3: Cross multiply
    426,574.32x = 639,978.36 × 186,644.72
  4. Step 4: Simplify right side
    426,574.32x = 119,448,581,808.26
  5. Step 5: Solve for x
    x = 119,448,581,808.26/426,574.32
  6. Step 6: Final answer
    x = 280,018.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.