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Finding the Fourth Proportional to 525,153.80, 786,564.30 and 455,169.80

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Solution

The fourth proportional to 525,153.80, 786,564.30 and 455,169.80 is: 681,743.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,153.80 : 786,564.30 = 455,169.80 : x
  2. Step 2: Convert to fraction form
    525,153.80/786,564.30 = 455,169.80/x
  3. Step 3: Cross multiply
    525,153.80x = 786,564.30 × 455,169.80
  4. Step 4: Simplify right side
    525,153.80x = 358,020,315,118.14
  5. Step 5: Solve for x
    x = 358,020,315,118.14/525,153.80
  6. Step 6: Final answer
    x = 681,743.74

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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.