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Finding the Fourth Proportional to 647,968.59, 893,891.84 and 421,531.47

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Solution

The fourth proportional to 647,968.59, 893,891.84 and 421,531.47 is: 581,515.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,968.59 : 893,891.84 = 421,531.47 : x
  2. Step 2: Convert to fraction form
    647,968.59/893,891.84 = 421,531.47/x
  3. Step 3: Cross multiply
    647,968.59x = 893,891.84 × 421,531.47
  4. Step 4: Simplify right side
    647,968.59x = 376,803,539,228.55
  5. Step 5: Solve for x
    x = 376,803,539,228.55/647,968.59
  6. Step 6: Final answer
    x = 581,515.13

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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.