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Finding the Fourth Proportional to 405,965.40, 607,781.70 and 248,501.40

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Solution

The fourth proportional to 405,965.40, 607,781.70 and 248,501.40 is: 372,038.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,965.40 : 607,781.70 = 248,501.40 : x
  2. Step 2: Convert to fraction form
    405,965.40/607,781.70 = 248,501.40/x
  3. Step 3: Cross multiply
    405,965.40x = 607,781.70 × 248,501.40
  4. Step 4: Simplify right side
    405,965.40x = 151,034,603,344.38
  5. Step 5: Solve for x
    x = 151,034,603,344.38/405,965.40
  6. Step 6: Final answer
    x = 372,038.12

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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.