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Finding the Fourth Proportional to 1,386,782.54, 1,913,723.25 and 774,940.34

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Solution

The fourth proportional to 1,386,782.54, 1,913,723.25 and 774,940.34 is: 1,069,397.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,782.54 : 1,913,723.25 = 774,940.34 : x
  2. Step 2: Convert to fraction form
    1,386,782.54/1,913,723.25 = 774,940.34/x
  3. Step 3: Cross multiply
    1,386,782.54x = 1,913,723.25 × 774,940.34
  4. Step 4: Simplify right side
    1,386,782.54x = 1,483,021,336,452.29
  5. Step 5: Solve for x
    x = 1,483,021,336,452.29/1,386,782.54
  6. Step 6: Final answer
    x = 1,069,397.18

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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.