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Finding the Fourth Proportional to 640,329.40, 883,688.59 and 368,438.60

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Solution

The fourth proportional to 640,329.40, 883,688.59 and 368,438.60 is: 508,464.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,329.40 : 883,688.59 = 368,438.60 : x
  2. Step 2: Convert to fraction form
    640,329.40/883,688.59 = 368,438.60/x
  3. Step 3: Cross multiply
    640,329.40x = 883,688.59 × 368,438.60
  4. Step 4: Simplify right side
    640,329.40x = 325,584,986,935.57
  5. Step 5: Solve for x
    x = 325,584,986,935.57/640,329.40
  6. Step 6: Final answer
    x = 508,464.84

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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.