Home / 727,428.20-1,091,142.30-328,519.40

Finding the Fourth Proportional to 727,428.20, 1,091,142.30 and 328,519.40

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Solution

The fourth proportional to 727,428.20, 1,091,142.30 and 328,519.40 is: 492,779.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    727,428.20 : 1,091,142.30 = 328,519.40 : x
  2. Step 2: Convert to fraction form
    727,428.20/1,091,142.30 = 328,519.40/x
  3. Step 3: Cross multiply
    727,428.20x = 1,091,142.30 × 328,519.40
  4. Step 4: Simplify right side
    727,428.20x = 358,461,413,710.62
  5. Step 5: Solve for x
    x = 358,461,413,710.62/727,428.20
  6. Step 6: Final answer
    x = 492,779.10

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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.