Home / 772,890.40-1,159,911.60-398,720.80

Finding the Fourth Proportional to 772,890.40, 1,159,911.60 and 398,720.80

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Solution

The fourth proportional to 772,890.40, 1,159,911.60 and 398,720.80 is: 598,378.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,890.40 : 1,159,911.60 = 398,720.80 : x
  2. Step 2: Convert to fraction form
    772,890.40/1,159,911.60 = 398,720.80/x
  3. Step 3: Cross multiply
    772,890.40x = 1,159,911.60 × 398,720.80
  4. Step 4: Simplify right side
    772,890.40x = 462,480,881,081.28
  5. Step 5: Solve for x
    x = 462,480,881,081.28/772,890.40
  6. Step 6: Final answer
    x = 598,378.35

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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.