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Finding the Fourth Proportional to 406,040.90, 607,749.15 and 316,811.30

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Solution

The fourth proportional to 406,040.90, 607,749.15 and 316,811.30 is: 474,193.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,040.90 : 607,749.15 = 316,811.30 : x
  2. Step 2: Convert to fraction form
    406,040.90/607,749.15 = 316,811.30/x
  3. Step 3: Cross multiply
    406,040.90x = 607,749.15 × 316,811.30
  4. Step 4: Simplify right side
    406,040.90x = 192,541,798,285.40
  5. Step 5: Solve for x
    x = 192,541,798,285.40/406,040.90
  6. Step 6: Final answer
    x = 474,193.11

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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.