Home / 1,287,389.84-1,776,416.63-771,022.71

Finding the Fourth Proportional to 1,287,389.84, 1,776,416.63 and 771,022.71

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Solution

The fourth proportional to 1,287,389.84, 1,776,416.63 and 771,022.71 is: 1,063,902.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,389.84 : 1,776,416.63 = 771,022.71 : x
  2. Step 2: Convert to fraction form
    1,287,389.84/1,776,416.63 = 771,022.71/x
  3. Step 3: Cross multiply
    1,287,389.84x = 1,776,416.63 × 771,022.71
  4. Step 4: Simplify right side
    1,287,389.84x = 1,369,657,560,296.55
  5. Step 5: Solve for x
    x = 1,369,657,560,296.55/1,287,389.84
  6. Step 6: Final answer
    x = 1,063,902.73

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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.