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Finding the Fourth Proportional to 908,419.32, 1,362,840 and 309,385.59

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Solution

The fourth proportional to 908,419.32, 1,362,840 and 309,385.59 is: 464,150.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,419.32 : 1,362,840 = 309,385.59 : x
  2. Step 2: Convert to fraction form
    908,419.32/1,362,840 = 309,385.59/x
  3. Step 3: Cross multiply
    908,419.32x = 1,362,840 × 309,385.59
  4. Step 4: Simplify right side
    908,419.32x = 421,643,057,475.60
  5. Step 5: Solve for x
    x = 421,643,057,475.60/908,419.32
  6. Step 6: Final answer
    x = 464,150.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.