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Finding the Fourth Proportional to 1,431,465.69, 1,975,429.05 and 786,927.40

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Solution

The fourth proportional to 1,431,465.69, 1,975,429.05 and 786,927.40 is: 1,085,963.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,465.69 : 1,975,429.05 = 786,927.40 : x
  2. Step 2: Convert to fraction form
    1,431,465.69/1,975,429.05 = 786,927.40/x
  3. Step 3: Cross multiply
    1,431,465.69x = 1,975,429.05 × 786,927.40
  4. Step 4: Simplify right side
    1,431,465.69x = 1,554,519,252,743.02
  5. Step 5: Solve for x
    x = 1,554,519,252,743.02/1,431,465.69
  6. Step 6: Final answer
    x = 1,085,963.33

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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.