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Finding the Fourth Proportional to 640,487.71, 883,876.52 and 350,099.67

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Solution

The fourth proportional to 640,487.71, 883,876.52 and 350,099.67 is: 483,139.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,487.71 : 883,876.52 = 350,099.67 : x
  2. Step 2: Convert to fraction form
    640,487.71/883,876.52 = 350,099.67/x
  3. Step 3: Cross multiply
    640,487.71x = 883,876.52 × 350,099.67
  4. Step 4: Simplify right side
    640,487.71x = 309,444,877,972.75
  5. Step 5: Solve for x
    x = 309,444,877,972.75/640,487.71
  6. Step 6: Final answer
    x = 483,139.45

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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.