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Finding the Fourth Proportional to 1,078,734.60, 1,618,101.90 and 742,811.40

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Solution

The fourth proportional to 1,078,734.60, 1,618,101.90 and 742,811.40 is: 1,114,217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,734.60 : 1,618,101.90 = 742,811.40 : x
  2. Step 2: Convert to fraction form
    1,078,734.60/1,618,101.90 = 742,811.40/x
  3. Step 3: Cross multiply
    1,078,734.60x = 1,618,101.90 × 742,811.40
  4. Step 4: Simplify right side
    1,078,734.60x = 1,201,944,537,681.66
  5. Step 5: Solve for x
    x = 1,201,944,537,681.66/1,078,734.60
  6. Step 6: Final answer
    x = 1,114,217.10

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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.