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Finding the Fourth Proportional to 501,415.45, 692,221.34 and 392,287.79

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Solution

The fourth proportional to 501,415.45, 692,221.34 and 392,287.79 is: 541,566.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,415.45 : 692,221.34 = 392,287.79 : x
  2. Step 2: Convert to fraction form
    501,415.45/692,221.34 = 392,287.79/x
  3. Step 3: Cross multiply
    501,415.45x = 692,221.34 × 392,287.79
  4. Step 4: Simplify right side
    501,415.45x = 271,549,982,370.71
  5. Step 5: Solve for x
    x = 271,549,982,370.71/501,415.45
  6. Step 6: Final answer
    x = 541,566.85

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Double scale
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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.