Home / 742,405.20-1,115,940.60-728,408.40

Finding the Fourth Proportional to 742,405.20, 1,115,940.60 and 728,408.40

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Solution

The fourth proportional to 742,405.20, 1,115,940.60 and 728,408.40 is: 1,094,901.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,405.20 : 1,115,940.60 = 728,408.40 : x
  2. Step 2: Convert to fraction form
    742,405.20/1,115,940.60 = 728,408.40/x
  3. Step 3: Cross multiply
    742,405.20x = 1,115,940.60 × 728,408.40
  4. Step 4: Simplify right side
    742,405.20x = 812,860,506,941.04
  5. Step 5: Solve for x
    x = 812,860,506,941.04/742,405.20
  6. Step 6: Final answer
    x = 1,094,901.42

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1.5x scale

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.