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Finding the Fourth Proportional to 640,309.10, 883,639.22 and 349,938.64

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Solution

The fourth proportional to 640,309.10, 883,639.22 and 349,938.64 is: 482,922.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,309.10 : 883,639.22 = 349,938.64 : x
  2. Step 2: Convert to fraction form
    640,309.10/883,639.22 = 349,938.64/x
  3. Step 3: Cross multiply
    640,309.10x = 883,639.22 × 349,938.64
  4. Step 4: Simplify right side
    640,309.10x = 309,219,506,897.46
  5. Step 5: Solve for x
    x = 309,219,506,897.46/640,309.10
  6. Step 6: Final answer
    x = 482,922.25

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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.