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Finding the Fourth Proportional to 808,595.60, 1,212,893.40 and 387,654.80

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Solution

The fourth proportional to 808,595.60, 1,212,893.40 and 387,654.80 is: 581,482.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,595.60 : 1,212,893.40 = 387,654.80 : x
  2. Step 2: Convert to fraction form
    808,595.60/1,212,893.40 = 387,654.80/x
  3. Step 3: Cross multiply
    808,595.60x = 1,212,893.40 × 387,654.80
  4. Step 4: Simplify right side
    808,595.60x = 470,183,948,398.32
  5. Step 5: Solve for x
    x = 470,183,948,398.32/808,595.60
  6. Step 6: Final answer
    x = 581,482.20

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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.