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Finding the Fourth Proportional to 835,661.80, 1,254,311.90 and 415,412.20

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Solution

The fourth proportional to 835,661.80, 1,254,311.90 and 415,412.20 is: 623,525.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    835,661.80 : 1,254,311.90 = 415,412.20 : x
  2. Step 2: Convert to fraction form
    835,661.80/1,254,311.90 = 415,412.20/x
  3. Step 3: Cross multiply
    835,661.80x = 1,254,311.90 × 415,412.20
  4. Step 4: Simplify right side
    835,661.80x = 521,056,465,865.18
  5. Step 5: Solve for x
    x = 521,056,465,865.18/835,661.80
  6. Step 6: Final answer
    x = 623,525.53

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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.