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Finding the Fourth Proportional to 1,375,802.64, 1,898,503.56 and 772,074

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Solution

The fourth proportional to 1,375,802.64, 1,898,503.56 and 772,074 is: 1,065,403.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,802.64 : 1,898,503.56 = 772,074 : x
  2. Step 2: Convert to fraction form
    1,375,802.64/1,898,503.56 = 772,074/x
  3. Step 3: Cross multiply
    1,375,802.64x = 1,898,503.56 × 772,074
  4. Step 4: Simplify right side
    1,375,802.64x = 1,465,785,237,583.44
  5. Step 5: Solve for x
    x = 1,465,785,237,583.44/1,375,802.64
  6. Step 6: Final answer
    x = 1,065,403.71

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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.