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Finding the Fourth Proportional to 642,306.72, 886,318.59 and 355,773.27

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Solution

The fourth proportional to 642,306.72, 886,318.59 and 355,773.27 is: 490,931.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,306.72 : 886,318.59 = 355,773.27 : x
  2. Step 2: Convert to fraction form
    642,306.72/886,318.59 = 355,773.27/x
  3. Step 3: Cross multiply
    642,306.72x = 886,318.59 × 355,773.27
  4. Step 4: Simplify right side
    642,306.72x = 315,328,463,026.09
  5. Step 5: Solve for x
    x = 315,328,463,026.09/642,306.72
  6. Step 6: Final answer
    x = 490,931.28

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1.5x scale

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.