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Finding the Fourth Proportional to 525,048.40, 787,054.20 and 258,590.80

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Solution

The fourth proportional to 525,048.40, 787,054.20 and 258,590.80 is: 387,630.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,048.40 : 787,054.20 = 258,590.80 : x
  2. Step 2: Convert to fraction form
    525,048.40/787,054.20 = 258,590.80/x
  3. Step 3: Cross multiply
    525,048.40x = 787,054.20 × 258,590.80
  4. Step 4: Simplify right side
    525,048.40x = 203,524,975,221.36
  5. Step 5: Solve for x
    x = 203,524,975,221.36/525,048.40
  6. Step 6: Final answer
    x = 387,630.88

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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.