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Finding the Fourth Proportional to 525,778.80, 788,668.20 and 385,810.80

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Solution

The fourth proportional to 525,778.80, 788,668.20 and 385,810.80 is: 578,716.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,778.80 : 788,668.20 = 385,810.80 : x
  2. Step 2: Convert to fraction form
    525,778.80/788,668.20 = 385,810.80/x
  3. Step 3: Cross multiply
    525,778.80x = 788,668.20 × 385,810.80
  4. Step 4: Simplify right side
    525,778.80x = 304,276,709,176.56
  5. Step 5: Solve for x
    x = 304,276,709,176.56/525,778.80
  6. Step 6: Final answer
    x = 578,716.20

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Similar ratio
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1.5x scale

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.