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Finding the Fourth Proportional to 808,478.40, 1,212,620.40 and 335,114.40

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Solution

The fourth proportional to 808,478.40, 1,212,620.40 and 335,114.40 is: 502,631.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,478.40 : 1,212,620.40 = 335,114.40 : x
  2. Step 2: Convert to fraction form
    808,478.40/1,212,620.40 = 335,114.40/x
  3. Step 3: Cross multiply
    808,478.40x = 1,212,620.40 × 335,114.40
  4. Step 4: Simplify right side
    808,478.40x = 406,366,557,773.76
  5. Step 5: Solve for x
    x = 406,366,557,773.76/808,478.40
  6. Step 6: Final answer
    x = 502,631.31

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1.5x scale

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.