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Finding the Fourth Proportional to 507,653.40, 761,481.84 and 128,573.94

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Solution

The fourth proportional to 507,653.40, 761,481.84 and 128,573.94 is: 192,861.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,653.40 : 761,481.84 = 128,573.94 : x
  2. Step 2: Convert to fraction form
    507,653.40/761,481.84 = 128,573.94/x
  3. Step 3: Cross multiply
    507,653.40x = 761,481.84 × 128,573.94
  4. Step 4: Simplify right side
    507,653.40x = 97,906,720,407.25
  5. Step 5: Solve for x
    x = 97,906,720,407.25/507,653.40
  6. Step 6: Final answer
    x = 192,861.35

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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.