Home / 525,811.20-788,716.80-521,145.60

Finding the Fourth Proportional to 525,811.20, 788,716.80 and 521,145.60

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Solution

The fourth proportional to 525,811.20, 788,716.80 and 521,145.60 is: 781,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,811.20 : 788,716.80 = 521,145.60 : x
  2. Step 2: Convert to fraction form
    525,811.20/788,716.80 = 521,145.60/x
  3. Step 3: Cross multiply
    525,811.20x = 788,716.80 × 521,145.60
  4. Step 4: Simplify right side
    525,811.20x = 411,036,289,966.08
  5. Step 5: Solve for x
    x = 411,036,289,966.08/525,811.20
  6. Step 6: Final answer
    x = 781,718.40

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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.