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Finding the Fourth Proportional to 525,784.80, 787,640.40 and 303,909.60

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Solution

The fourth proportional to 525,784.80, 787,640.40 and 303,909.60 is: 455,265.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,784.80 : 787,640.40 = 303,909.60 : x
  2. Step 2: Convert to fraction form
    525,784.80/787,640.40 = 303,909.60/x
  3. Step 3: Cross multiply
    525,784.80x = 787,640.40 × 303,909.60
  4. Step 4: Simplify right side
    525,784.80x = 239,371,478,907.84
  5. Step 5: Solve for x
    x = 239,371,478,907.84/525,784.80
  6. Step 6: Final answer
    x = 455,265.12

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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.