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Finding the Fourth Proportional to 390,674.08, 586,028.94 and 124,409.56

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Solution

The fourth proportional to 390,674.08, 586,028.94 and 124,409.56 is: 186,620.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,674.08 : 586,028.94 = 124,409.56 : x
  2. Step 2: Convert to fraction form
    390,674.08/586,028.94 = 124,409.56/x
  3. Step 3: Cross multiply
    390,674.08x = 586,028.94 × 124,409.56
  4. Step 4: Simplify right side
    390,674.08x = 72,907,602,572.67
  5. Step 5: Solve for x
    x = 72,907,602,572.67/390,674.08
  6. Step 6: Final answer
    x = 186,620.01

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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.