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Finding the Fourth Proportional to 640,681.68, 884,142.32 and 350,312

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Solution

The fourth proportional to 640,681.68, 884,142.32 and 350,312 is: 483,431.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,681.68 : 884,142.32 = 350,312 : x
  2. Step 2: Convert to fraction form
    640,681.68/884,142.32 = 350,312/x
  3. Step 3: Cross multiply
    640,681.68x = 884,142.32 × 350,312
  4. Step 4: Simplify right side
    640,681.68x = 309,725,664,403.84
  5. Step 5: Solve for x
    x = 309,725,664,403.84/640,681.68
  6. Step 6: Final answer
    x = 483,431.44

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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.