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Finding the Fourth Proportional to 662,054.92, 913,476.54 and 390,133.96

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Solution

The fourth proportional to 662,054.92, 913,476.54 and 390,133.96 is: 538,291.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,054.92 : 913,476.54 = 390,133.96 : x
  2. Step 2: Convert to fraction form
    662,054.92/913,476.54 = 390,133.96/x
  3. Step 3: Cross multiply
    662,054.92x = 913,476.54 × 390,133.96
  4. Step 4: Simplify right side
    662,054.92x = 356,378,219,917.30
  5. Step 5: Solve for x
    x = 356,378,219,917.30/662,054.92
  6. Step 6: Final answer
    x = 538,291.02

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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.