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Finding the Fourth Proportional to 405,665.40, 607,331.70 and 248,201.40

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Solution

The fourth proportional to 405,665.40, 607,331.70 and 248,201.40 is: 371,588.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,665.40 : 607,331.70 = 248,201.40 : x
  2. Step 2: Convert to fraction form
    405,665.40/607,331.70 = 248,201.40/x
  3. Step 3: Cross multiply
    405,665.40x = 607,331.70 × 248,201.40
  4. Step 4: Simplify right side
    405,665.40x = 150,740,578,204.38
  5. Step 5: Solve for x
    x = 150,740,578,204.38/405,665.40
  6. Step 6: Final answer
    x = 371,588.45

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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.