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Finding the Fourth Proportional to 640,488.71, 883,877.90 and 350,100.67

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Solution

The fourth proportional to 640,488.71, 883,877.90 and 350,100.67 is: 483,140.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,488.71 : 883,877.90 = 350,100.67 : x
  2. Step 2: Convert to fraction form
    640,488.71/883,877.90 = 350,100.67/x
  3. Step 3: Cross multiply
    640,488.71x = 883,877.90 × 350,100.67
  4. Step 4: Simplify right side
    640,488.71x = 309,446,244,988.19
  5. Step 5: Solve for x
    x = 309,446,244,988.19/640,488.71
  6. Step 6: Final answer
    x = 483,140.83

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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.