Home / 808,521.60-1,212,782.40-387,580.80

Finding the Fourth Proportional to 808,521.60, 1,212,782.40 and 387,580.80

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Solution

The fourth proportional to 808,521.60, 1,212,782.40 and 387,580.80 is: 581,371.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,521.60 : 1,212,782.40 = 387,580.80 : x
  2. Step 2: Convert to fraction form
    808,521.60/1,212,782.40 = 387,580.80/x
  3. Step 3: Cross multiply
    808,521.60x = 1,212,782.40 × 387,580.80
  4. Step 4: Simplify right side
    808,521.60x = 470,051,172,817.92
  5. Step 5: Solve for x
    x = 470,051,172,817.92/808,521.60
  6. Step 6: Final answer
    x = 581,371.20

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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.