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Finding the Fourth Proportional to 1,931,779.56, 2,897,669.56 and 669,607.20

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Solution

The fourth proportional to 1,931,779.56, 2,897,669.56 and 669,607.20 is: 1,004,410.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931,779.56 : 2,897,669.56 = 669,607.20 : x
  2. Step 2: Convert to fraction form
    1,931,779.56/2,897,669.56 = 669,607.20/x
  3. Step 3: Cross multiply
    1,931,779.56x = 2,897,669.56 × 669,607.20
  4. Step 4: Simplify right side
    1,931,779.56x = 1,940,300,400,596.83
  5. Step 5: Solve for x
    x = 1,940,300,400,596.83/1,931,779.56
  6. Step 6: Final answer
    x = 1,004,410.88

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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.