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Finding the Fourth Proportional to 658,643.21, 908,928.53 and 356,837.21

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Solution

The fourth proportional to 658,643.21, 908,928.53 and 356,837.21 is: 492,435.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,643.21 : 908,928.53 = 356,837.21 : x
  2. Step 2: Convert to fraction form
    658,643.21/908,928.53 = 356,837.21/x
  3. Step 3: Cross multiply
    658,643.21x = 908,928.53 × 356,837.21
  4. Step 4: Simplify right side
    658,643.21x = 324,339,518,950.42
  5. Step 5: Solve for x
    x = 324,339,518,950.42/658,643.21
  6. Step 6: Final answer
    x = 492,435.83

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1.5x scale

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.