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Finding the Fourth Proportional to 390,695.58, 586,131.75 and 124,471.26

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Solution

The fourth proportional to 390,695.58, 586,131.75 and 124,471.26 is: 186,735.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,695.58 : 586,131.75 = 124,471.26 : x
  2. Step 2: Convert to fraction form
    390,695.58/586,131.75 = 124,471.26/x
  3. Step 3: Cross multiply
    390,695.58x = 586,131.75 × 124,471.26
  4. Step 4: Simplify right side
    390,695.58x = 72,956,557,448.51
  5. Step 5: Solve for x
    x = 72,956,557,448.51/390,695.58
  6. Step 6: Final answer
    x = 186,735.05

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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.