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Finding the Fourth Proportional to 469,860.15, 648,407.00 and 255,000.21

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Solution

The fourth proportional to 469,860.15, 648,407.00 and 255,000.21 is: 351,900.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,860.15 : 648,407.00 = 255,000.21 : x
  2. Step 2: Convert to fraction form
    469,860.15/648,407.00 = 255,000.21/x
  3. Step 3: Cross multiply
    469,860.15x = 648,407.00 × 255,000.21
  4. Step 4: Simplify right side
    469,860.15x = 165,343,919,890.47
  5. Step 5: Solve for x
    x = 165,343,919,890.47/469,860.15
  6. Step 6: Final answer
    x = 351,900.28

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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.