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Finding the Fourth Proportional to 654,670.40, 903,309.68 and 382,685.72

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Solution

The fourth proportional to 654,670.40, 903,309.68 and 382,685.72 is: 528,027.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,670.40 : 903,309.68 = 382,685.72 : x
  2. Step 2: Convert to fraction form
    654,670.40/903,309.68 = 382,685.72/x
  3. Step 3: Cross multiply
    654,670.40x = 903,309.68 × 382,685.72
  4. Step 4: Simplify right side
    654,670.40x = 345,683,711,713.94
  5. Step 5: Solve for x
    x = 345,683,711,713.94/654,670.40
  6. Step 6: Final answer
    x = 528,027.10

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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.