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Finding the Fourth Proportional to 370,409.48, 555,232.84 and 145,678.83

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Solution

The fourth proportional to 370,409.48, 555,232.84 and 145,678.83 is: 218,368.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,409.48 : 555,232.84 = 145,678.83 : x
  2. Step 2: Convert to fraction form
    370,409.48/555,232.84 = 145,678.83/x
  3. Step 3: Cross multiply
    370,409.48x = 555,232.84 × 145,678.83
  4. Step 4: Simplify right side
    370,409.48x = 80,885,670,508.78
  5. Step 5: Solve for x
    x = 80,885,670,508.78/370,409.48
  6. Step 6: Final answer
    x = 218,368.25

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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.