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Finding the Fourth Proportional to 469,293.42, 648,159.39 and 318,127.98

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Solution

The fourth proportional to 469,293.42, 648,159.39 and 318,127.98 is: 439,378.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,293.42 : 648,159.39 = 318,127.98 : x
  2. Step 2: Convert to fraction form
    469,293.42/648,159.39 = 318,127.98/x
  3. Step 3: Cross multiply
    469,293.42x = 648,159.39 × 318,127.98
  4. Step 4: Simplify right side
    469,293.42x = 206,197,637,458.73
  5. Step 5: Solve for x
    x = 206,197,637,458.73/469,293.42
  6. Step 6: Final answer
    x = 439,378.92

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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.