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Finding the Fourth Proportional to 662,722.14, 914,512.98 and 390,776.88

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Solution

The fourth proportional to 662,722.14, 914,512.98 and 390,776.88 is: 539,246.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,722.14 : 914,512.98 = 390,776.88 : x
  2. Step 2: Convert to fraction form
    662,722.14/914,512.98 = 390,776.88/x
  3. Step 3: Cross multiply
    662,722.14x = 914,512.98 × 390,776.88
  4. Step 4: Simplify right side
    662,722.14x = 357,370,529,043.90
  5. Step 5: Solve for x
    x = 357,370,529,043.90/662,722.14
  6. Step 6: Final answer
    x = 539,246.40

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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.