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Finding the Fourth Proportional to 1,369,516.62, 1,889,931.50 and 765,904.62

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Solution

The fourth proportional to 1,369,516.62, 1,889,931.50 and 765,904.62 is: 1,056,947.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,516.62 : 1,889,931.50 = 765,904.62 : x
  2. Step 2: Convert to fraction form
    1,369,516.62/1,889,931.50 = 765,904.62/x
  3. Step 3: Cross multiply
    1,369,516.62x = 1,889,931.50 × 765,904.62
  4. Step 4: Simplify right side
    1,369,516.62x = 1,447,507,267,333.53
  5. Step 5: Solve for x
    x = 1,447,507,267,333.53/1,369,516.62
  6. Step 6: Final answer
    x = 1,056,947.57

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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.