Home / 525,087.90-787,631.85-399,116.70

Finding the Fourth Proportional to 525,087.90, 787,631.85 and 399,116.70

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Solution

The fourth proportional to 525,087.90, 787,631.85 and 399,116.70 is: 598,675.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,087.90 : 787,631.85 = 399,116.70 : x
  2. Step 2: Convert to fraction form
    525,087.90/787,631.85 = 399,116.70/x
  3. Step 3: Cross multiply
    525,087.90x = 787,631.85 × 399,116.70
  4. Step 4: Simplify right side
    525,087.90x = 314,357,024,786.90
  5. Step 5: Solve for x
    x = 314,357,024,786.90/525,087.90
  6. Step 6: Final answer
    x = 598,675.05

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Double scale
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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.