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Finding the Fourth Proportional to 258,313.70, 387,312.06 and 100,357.76

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Solution

The fourth proportional to 258,313.70, 387,312.06 and 100,357.76 is: 150,475.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,313.70 : 387,312.06 = 100,357.76 : x
  2. Step 2: Convert to fraction form
    258,313.70/387,312.06 = 100,357.76/x
  3. Step 3: Cross multiply
    258,313.70x = 387,312.06 × 100,357.76
  4. Step 4: Simplify right side
    258,313.70x = 38,869,770,762.59
  5. Step 5: Solve for x
    x = 38,869,770,762.59/258,313.70
  6. Step 6: Final answer
    x = 150,475.06

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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.