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Finding the Fourth Proportional to 656,445.94, 905,895.50 and 354,639.94

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Solution

The fourth proportional to 656,445.94, 905,895.50 and 354,639.94 is: 489,403.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,445.94 : 905,895.50 = 354,639.94 : x
  2. Step 2: Convert to fraction form
    656,445.94/905,895.50 = 354,639.94/x
  3. Step 3: Cross multiply
    656,445.94x = 905,895.50 × 354,639.94
  4. Step 4: Simplify right side
    656,445.94x = 321,266,721,728.33
  5. Step 5: Solve for x
    x = 321,266,721,728.33/656,445.94
  6. Step 6: Final answer
    x = 489,403.17

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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.