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Finding the Fourth Proportional to 525,089.40, 787,115.70 and 258,631.80

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Solution

The fourth proportional to 525,089.40, 787,115.70 and 258,631.80 is: 387,692.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,089.40 : 787,115.70 = 258,631.80 : x
  2. Step 2: Convert to fraction form
    525,089.40/787,115.70 = 258,631.80/x
  3. Step 3: Cross multiply
    525,089.40x = 787,115.70 × 258,631.80
  4. Step 4: Simplify right side
    525,089.40x = 203,573,150,299.26
  5. Step 5: Solve for x
    x = 203,573,150,299.26/525,089.40
  6. Step 6: Final answer
    x = 387,692.36

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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.