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Finding the Fourth Proportional to 1,423,497.96, 1,964,427.08 and 778,918.10

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Solution

The fourth proportional to 1,423,497.96, 1,964,427.08 and 778,918.10 is: 1,074,906.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423,497.96 : 1,964,427.08 = 778,918.10 : x
  2. Step 2: Convert to fraction form
    1,423,497.96/1,964,427.08 = 778,918.10/x
  3. Step 3: Cross multiply
    1,423,497.96x = 1,964,427.08 × 778,918.10
  4. Step 4: Simplify right side
    1,423,497.96x = 1,530,127,795,025.42
  5. Step 5: Solve for x
    x = 1,530,127,795,025.42/1,423,497.96
  6. Step 6: Final answer
    x = 1,074,906.91

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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.