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Finding the Fourth Proportional to 668,756.80, 922,705.86 and 396,598.42

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Solution

The fourth proportional to 668,756.80, 922,705.86 and 396,598.42 is: 547,199.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,756.80 : 922,705.86 = 396,598.42 : x
  2. Step 2: Convert to fraction form
    668,756.80/922,705.86 = 396,598.42/x
  3. Step 3: Cross multiply
    668,756.80x = 922,705.86 × 396,598.42
  4. Step 4: Simplify right side
    668,756.80x = 365,943,686,200.74
  5. Step 5: Solve for x
    x = 365,943,686,200.74/668,756.80
  6. Step 6: Final answer
    x = 547,199.95

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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.