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Finding the Fourth Proportional to 525,101.40, 787,652.10 and 399,130.20

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Solution

The fourth proportional to 525,101.40, 787,652.10 and 399,130.20 is: 598,695.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,101.40 : 787,652.10 = 399,130.20 : x
  2. Step 2: Convert to fraction form
    525,101.40/787,652.10 = 399,130.20/x
  3. Step 3: Cross multiply
    525,101.40x = 787,652.10 × 399,130.20
  4. Step 4: Simplify right side
    525,101.40x = 314,375,740,203.42
  5. Step 5: Solve for x
    x = 314,375,740,203.42/525,101.40
  6. Step 6: Final answer
    x = 598,695.30

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Similar ratio
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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.