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Finding the Fourth Proportional to 1,226,475, 1,692,561.42 and 689,931

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Solution

The fourth proportional to 1,226,475, 1,692,561.42 and 689,931 is: 952,119.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226,475 : 1,692,561.42 = 689,931 : x
  2. Step 2: Convert to fraction form
    1,226,475/1,692,561.42 = 689,931/x
  3. Step 3: Cross multiply
    1,226,475x = 1,692,561.42 × 689,931
  4. Step 4: Simplify right side
    1,226,475x = 1,167,750,593,062.02
  5. Step 5: Solve for x
    x = 1,167,750,593,062.02/1,226,475
  6. Step 6: Final answer
    x = 952,119.36

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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.