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Finding the Fourth Proportional to 455,340.80, 681,782.40 and 455,340.80

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Solution

The fourth proportional to 455,340.80, 681,782.40 and 455,340.80 is: 681,782.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,340.80 : 681,782.40 = 455,340.80 : x
  2. Step 2: Convert to fraction form
    455,340.80/681,782.40 = 455,340.80/x
  3. Step 3: Cross multiply
    455,340.80x = 681,782.40 × 455,340.80
  4. Step 4: Simplify right side
    455,340.80x = 310,443,343,441.92
  5. Step 5: Solve for x
    x = 310,443,343,441.92/455,340.80
  6. Step 6: Final answer
    x = 681,782.40

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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.