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Finding the Fourth Proportional to 646,351.71, 892,002.15 and 388,307.58

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Solution

The fourth proportional to 646,351.71, 892,002.15 and 388,307.58 is: 535,886.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,351.71 : 892,002.15 = 388,307.58 : x
  2. Step 2: Convert to fraction form
    646,351.71/892,002.15 = 388,307.58/x
  3. Step 3: Cross multiply
    646,351.71x = 892,002.15 × 388,307.58
  4. Step 4: Simplify right side
    646,351.71x = 346,371,196,221.30
  5. Step 5: Solve for x
    x = 346,371,196,221.30/646,351.71
  6. Step 6: Final answer
    x = 535,886.56

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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.