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Finding the Fourth Proportional to 640,035.28, 883,191.42 and 368,030.80

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Solution

The fourth proportional to 640,035.28, 883,191.42 and 368,030.80 is: 507,849.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,035.28 : 883,191.42 = 368,030.80 : x
  2. Step 2: Convert to fraction form
    640,035.28/883,191.42 = 368,030.80/x
  3. Step 3: Cross multiply
    640,035.28x = 883,191.42 × 368,030.80
  4. Step 4: Simplify right side
    640,035.28x = 325,041,644,855.74
  5. Step 5: Solve for x
    x = 325,041,644,855.74/640,035.28
  6. Step 6: Final answer
    x = 507,849.57

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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.