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Finding the Fourth Proportional to 628,611.79, 867,484.22 and 342,133.93

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Solution

The fourth proportional to 628,611.79, 867,484.22 and 342,133.93 is: 472,144.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,611.79 : 867,484.22 = 342,133.93 : x
  2. Step 2: Convert to fraction form
    628,611.79/867,484.22 = 342,133.93/x
  3. Step 3: Cross multiply
    628,611.79x = 867,484.22 × 342,133.93
  4. Step 4: Simplify right side
    628,611.79x = 296,795,779,353.49
  5. Step 5: Solve for x
    x = 296,795,779,353.49/628,611.79
  6. Step 6: Final answer
    x = 472,144.79

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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.