Home / 917,911.52-1,373,918.88-490,378.40

Finding the Fourth Proportional to 917,911.52, 1,373,918.88 and 490,378.40

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Solution

The fourth proportional to 917,911.52, 1,373,918.88 and 490,378.40 is: 733,992.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,911.52 : 1,373,918.88 = 490,378.40 : x
  2. Step 2: Convert to fraction form
    917,911.52/1,373,918.88 = 490,378.40/x
  3. Step 3: Cross multiply
    917,911.52x = 1,373,918.88 × 490,378.40
  4. Step 4: Simplify right side
    917,911.52x = 673,740,142,104.19
  5. Step 5: Solve for x
    x = 673,740,142,104.19/917,911.52
  6. Step 6: Final answer
    x = 733,992.47

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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.