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Finding the Fourth Proportional to 1,386,541.47, 1,913,414.07 and 774,799.60

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Solution

The fourth proportional to 1,386,541.47, 1,913,414.07 and 774,799.60 is: 1,069,216.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,541.47 : 1,913,414.07 = 774,799.60 : x
  2. Step 2: Convert to fraction form
    1,386,541.47/1,913,414.07 = 774,799.60/x
  3. Step 3: Cross multiply
    1,386,541.47x = 1,913,414.07 × 774,799.60
  4. Step 4: Simplify right side
    1,386,541.47x = 1,482,512,456,070.37
  5. Step 5: Solve for x
    x = 1,482,512,456,070.37/1,386,541.47
  6. Step 6: Final answer
    x = 1,069,216.09

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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.