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Finding the Fourth Proportional to 647,335.81, 893,428.64 and 389,473.39

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Solution

The fourth proportional to 647,335.81, 893,428.64 and 389,473.39 is: 537,536.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,335.81 : 893,428.64 = 389,473.39 : x
  2. Step 2: Convert to fraction form
    647,335.81/893,428.64 = 389,473.39/x
  3. Step 3: Cross multiply
    647,335.81x = 893,428.64 × 389,473.39
  4. Step 4: Simplify right side
    647,335.81x = 347,966,679,884.00
  5. Step 5: Solve for x
    x = 347,966,679,884.00/647,335.81
  6. Step 6: Final answer
    x = 537,536.59

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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.