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Finding the Fourth Proportional to 525,663.75, 725,415.98 and 287,199.75

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Solution

The fourth proportional to 525,663.75, 725,415.98 and 287,199.75 is: 396,335.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,663.75 : 725,415.98 = 287,199.75 : x
  2. Step 2: Convert to fraction form
    525,663.75/725,415.98 = 287,199.75/x
  3. Step 3: Cross multiply
    525,663.75x = 725,415.98 × 287,199.75
  4. Step 4: Simplify right side
    525,663.75x = 208,339,286,666.01
  5. Step 5: Solve for x
    x = 208,339,286,666.01/525,663.75
  6. Step 6: Final answer
    x = 396,335.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.