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Finding the Fourth Proportional to 826,626.90, 1,239,940.35 and 742,646.10

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Solution

The fourth proportional to 826,626.90, 1,239,940.35 and 742,646.10 is: 1,113,969.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,626.90 : 1,239,940.35 = 742,646.10 : x
  2. Step 2: Convert to fraction form
    826,626.90/1,239,940.35 = 742,646.10/x
  3. Step 3: Cross multiply
    826,626.90x = 1,239,940.35 × 742,646.10
  4. Step 4: Simplify right side
    826,626.90x = 920,836,865,160.14
  5. Step 5: Solve for x
    x = 920,836,865,160.14/826,626.90
  6. Step 6: Final answer
    x = 1,113,969.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.