Home / 825,494.19-1,137,639.43-643,918.51

Finding the Fourth Proportional to 825,494.19, 1,137,639.43 and 643,918.51

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Solution

The fourth proportional to 825,494.19, 1,137,639.43 and 643,918.51 is: 887,404.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,494.19 : 1,137,639.43 = 643,918.51 : x
  2. Step 2: Convert to fraction form
    825,494.19/1,137,639.43 = 643,918.51/x
  3. Step 3: Cross multiply
    825,494.19x = 1,137,639.43 × 643,918.51
  4. Step 4: Simplify right side
    825,494.19x = 732,547,088,909.80
  5. Step 5: Solve for x
    x = 732,547,088,909.80/825,494.19
  6. Step 6: Final answer
    x = 887,404.30

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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.