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Finding the Fourth Proportional to 1,017,668.72, 1,531,607.18 and 766,251.20

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Solution

The fourth proportional to 1,017,668.72, 1,531,607.18 and 766,251.20 is: 1,153,219.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017,668.72 : 1,531,607.18 = 766,251.20 : x
  2. Step 2: Convert to fraction form
    1,017,668.72/1,531,607.18 = 766,251.20/x
  3. Step 3: Cross multiply
    1,017,668.72x = 1,531,607.18 × 766,251.20
  4. Step 4: Simplify right side
    1,017,668.72x = 1,173,595,839,603.62
  5. Step 5: Solve for x
    x = 1,173,595,839,603.62/1,017,668.72
  6. Step 6: Final answer
    x = 1,153,219.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.