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Finding the Fourth Proportional to 614,722.50, 921,525.59 and 215,145.30

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Solution

The fourth proportional to 614,722.50, 921,525.59 and 215,145.30 is: 322,522.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,722.50 : 921,525.59 = 215,145.30 : x
  2. Step 2: Convert to fraction form
    614,722.50/921,525.59 = 215,145.30/x
  3. Step 3: Cross multiply
    614,722.50x = 921,525.59 × 215,145.30
  4. Step 4: Simplify right side
    614,722.50x = 198,261,899,518.23
  5. Step 5: Solve for x
    x = 198,261,899,518.23/614,722.50
  6. Step 6: Final answer
    x = 322,522.60

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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.