Home / 390,926.64-539,448.96-221,171.76

Finding the Fourth Proportional to 390,926.64, 539,448.96 and 221,171.76

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Solution

The fourth proportional to 390,926.64, 539,448.96 and 221,171.76 is: 305,200.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,926.64 : 539,448.96 = 221,171.76 : x
  2. Step 2: Convert to fraction form
    390,926.64/539,448.96 = 221,171.76/x
  3. Step 3: Cross multiply
    390,926.64x = 539,448.96 × 221,171.76
  4. Step 4: Simplify right side
    390,926.64x = 119,310,875,913.37
  5. Step 5: Solve for x
    x = 119,310,875,913.37/390,926.64
  6. Step 6: Final answer
    x = 305,200.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.