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Finding the Fourth Proportional to 1,267,654.71, 1,749,369.60 and 686,877.69

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Solution

The fourth proportional to 1,267,654.71, 1,749,369.60 and 686,877.69 is: 947,894.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267,654.71 : 1,749,369.60 = 686,877.69 : x
  2. Step 2: Convert to fraction form
    1,267,654.71/1,749,369.60 = 686,877.69/x
  3. Step 3: Cross multiply
    1,267,654.71x = 1,749,369.60 × 686,877.69
  4. Step 4: Simplify right side
    1,267,654.71x = 1,201,602,949,804.22
  5. Step 5: Solve for x
    x = 1,201,602,949,804.22/1,267,654.71
  6. Step 6: Final answer
    x = 947,894.52

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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.