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Finding the Fourth Proportional to 1,170,483.40, 1,616,631.78 and 787,904.20

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Solution

The fourth proportional to 1,170,483.40, 1,616,631.78 and 787,904.20 is: 1,088,226.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170,483.40 : 1,616,631.78 = 787,904.20 : x
  2. Step 2: Convert to fraction form
    1,170,483.40/1,616,631.78 = 787,904.20/x
  3. Step 3: Cross multiply
    1,170,483.40x = 1,616,631.78 × 787,904.20
  4. Step 4: Simplify right side
    1,170,483.40x = 1,273,750,969,315.48
  5. Step 5: Solve for x
    x = 1,273,750,969,315.48/1,170,483.40
  6. Step 6: Final answer
    x = 1,088,226.43

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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.