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Finding the Fourth Proportional to 261,342.40, 391,430.40 and 201,710.20

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Solution

The fourth proportional to 261,342.40, 391,430.40 and 201,710.20 is: 302,115.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,342.40 : 391,430.40 = 201,710.20 : x
  2. Step 2: Convert to fraction form
    261,342.40/391,430.40 = 201,710.20/x
  3. Step 3: Cross multiply
    261,342.40x = 391,430.40 × 201,710.20
  4. Step 4: Simplify right side
    261,342.40x = 78,955,504,270.08
  5. Step 5: Solve for x
    x = 78,955,504,270.08/261,342.40
  6. Step 6: Final answer
    x = 302,115.17

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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.