Home / 787,830.14-1,087,708.40-642,981.94

Finding the Fourth Proportional to 787,830.14, 1,087,708.40 and 642,981.94

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Solution

The fourth proportional to 787,830.14, 1,087,708.40 and 642,981.94 is: 887,725.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,830.14 : 1,087,708.40 = 642,981.94 : x
  2. Step 2: Convert to fraction form
    787,830.14/1,087,708.40 = 642,981.94/x
  3. Step 3: Cross multiply
    787,830.14x = 1,087,708.40 × 642,981.94
  4. Step 4: Simplify right side
    787,830.14x = 699,376,861,513.02
  5. Step 5: Solve for x
    x = 699,376,861,513.02/787,830.14
  6. Step 6: Final answer
    x = 887,725.45

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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.