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Finding the Fourth Proportional to 409,307.56, 614,044.38 and 128,759.56

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Solution

The fourth proportional to 409,307.56, 614,044.38 and 128,759.56 is: 193,165.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,307.56 : 614,044.38 = 128,759.56 : x
  2. Step 2: Convert to fraction form
    409,307.56/614,044.38 = 128,759.56/x
  3. Step 3: Cross multiply
    409,307.56x = 614,044.38 × 128,759.56
  4. Step 4: Simplify right side
    409,307.56x = 79,064,084,189.27
  5. Step 5: Solve for x
    x = 79,064,084,189.27/409,307.56
  6. Step 6: Final answer
    x = 193,165.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.