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Finding the Fourth Proportional to 620,502.93, 856,330.62 and 467,270.78

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Solution

The fourth proportional to 620,502.93, 856,330.62 and 467,270.78 is: 644,861.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,502.93 : 856,330.62 = 467,270.78 : x
  2. Step 2: Convert to fraction form
    620,502.93/856,330.62 = 467,270.78/x
  3. Step 3: Cross multiply
    620,502.93x = 856,330.62 × 467,270.78
  4. Step 4: Simplify right side
    620,502.93x = 400,138,272,463.63
  5. Step 5: Solve for x
    x = 400,138,272,463.63/620,502.93
  6. Step 6: Final answer
    x = 644,861.21

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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.