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Finding the Fourth Proportional to 877,813.80, 1,211,383.06 and 475,405.80

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Solution

The fourth proportional to 877,813.80, 1,211,383.06 and 475,405.80 is: 656,060.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,813.80 : 1,211,383.06 = 475,405.80 : x
  2. Step 2: Convert to fraction form
    877,813.80/1,211,383.06 = 475,405.80/x
  3. Step 3: Cross multiply
    877,813.80x = 1,211,383.06 × 475,405.80
  4. Step 4: Simplify right side
    877,813.80x = 575,898,532,745.75
  5. Step 5: Solve for x
    x = 575,898,532,745.75/877,813.80
  6. Step 6: Final answer
    x = 656,060.01

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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.