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Finding the Fourth Proportional to 662,705.10, 914,489.54 and 390,759.84

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Solution

The fourth proportional to 662,705.10, 914,489.54 and 390,759.84 is: 539,222.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,705.10 : 914,489.54 = 390,759.84 : x
  2. Step 2: Convert to fraction form
    662,705.10/914,489.54 = 390,759.84/x
  3. Step 3: Cross multiply
    662,705.10x = 914,489.54 × 390,759.84
  4. Step 4: Simplify right side
    662,705.10x = 357,345,786,332.07
  5. Step 5: Solve for x
    x = 357,345,786,332.07/662,705.10
  6. Step 6: Final answer
    x = 539,222.93

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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.