Home / 787,829.72-1,087,707.80-642,981.51

Finding the Fourth Proportional to 787,829.72, 1,087,707.80 and 642,981.51

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Solution

The fourth proportional to 787,829.72, 1,087,707.80 and 642,981.51 is: 887,724.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,829.72 : 1,087,707.80 = 642,981.51 : x
  2. Step 2: Convert to fraction form
    787,829.72/1,087,707.80 = 642,981.51/x
  3. Step 3: Cross multiply
    787,829.72x = 1,087,707.80 × 642,981.51
  4. Step 4: Simplify right side
    787,829.72x = 699,376,005,290.23
  5. Step 5: Solve for x
    x = 699,376,005,290.23/787,829.72
  6. Step 6: Final answer
    x = 887,724.84

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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.