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Finding the Fourth Proportional to 640,038.51, 883,279.89 and 368,106.53

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Solution

The fourth proportional to 640,038.51, 883,279.89 and 368,106.53 is: 508,002.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,038.51 : 883,279.89 = 368,106.53 : x
  2. Step 2: Convert to fraction form
    640,038.51/883,279.89 = 368,106.53/x
  3. Step 3: Cross multiply
    640,038.51x = 883,279.89 × 368,106.53
  4. Step 4: Simplify right side
    640,038.51x = 325,141,090,910.28
  5. Step 5: Solve for x
    x = 325,141,090,910.28/640,038.51
  6. Step 6: Final answer
    x = 508,002.39

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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.