Home / 620,729.40-929,538.90-409,222.20

Finding the Fourth Proportional to 620,729.40, 929,538.90 and 409,222.20

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Solution

The fourth proportional to 620,729.40, 929,538.90 and 409,222.20 is: 612,808.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,729.40 : 929,538.90 = 409,222.20 : x
  2. Step 2: Convert to fraction form
    620,729.40/929,538.90 = 409,222.20/x
  3. Step 3: Cross multiply
    620,729.40x = 929,538.90 × 409,222.20
  4. Step 4: Simplify right side
    620,729.40x = 380,387,953,643.58
  5. Step 5: Solve for x
    x = 380,387,953,643.58/620,729.40
  6. Step 6: Final answer
    x = 612,808.02

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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.