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Finding the Fourth Proportional to 1,369,569.56, 1,890,611.37 and 818,479.76

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Solution

The fourth proportional to 1,369,569.56, 1,890,611.37 and 818,479.76 is: 1,129,863.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,569.56 : 1,890,611.37 = 818,479.76 : x
  2. Step 2: Convert to fraction form
    1,369,569.56/1,890,611.37 = 818,479.76/x
  3. Step 3: Cross multiply
    1,369,569.56x = 1,890,611.37 × 818,479.76
  4. Step 4: Simplify right side
    1,369,569.56x = 1,547,427,130,917.81
  5. Step 5: Solve for x
    x = 1,547,427,130,917.81/1,369,569.56
  6. Step 6: Final answer
    x = 1,129,863.85

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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.