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Finding the Fourth Proportional to 1,981,459.90, 2,971,252.95 and 767,605.06

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Solution

The fourth proportional to 1,981,459.90, 2,971,252.95 and 767,605.06 is: 1,151,044.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981,459.90 : 2,971,252.95 = 767,605.06 : x
  2. Step 2: Convert to fraction form
    1,981,459.90/2,971,252.95 = 767,605.06/x
  3. Step 3: Cross multiply
    1,981,459.90x = 2,971,252.95 × 767,605.06
  4. Step 4: Simplify right side
    1,981,459.90x = 2,280,748,798,959.93
  5. Step 5: Solve for x
    x = 2,280,748,798,959.93/1,981,459.90
  6. Step 6: Final answer
    x = 1,151,044.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.