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Finding the Fourth Proportional to 1,811,978.61, 2,500,547.30 and 996,188.03

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Solution

The fourth proportional to 1,811,978.61, 2,500,547.30 and 996,188.03 is: 1,374,748.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811,978.61 : 2,500,547.30 = 996,188.03 : x
  2. Step 2: Convert to fraction form
    1,811,978.61/2,500,547.30 = 996,188.03/x
  3. Step 3: Cross multiply
    1,811,978.61x = 2,500,547.30 × 996,188.03
  4. Step 4: Simplify right side
    1,811,978.61x = 2,491,015,271,225.14
  5. Step 5: Solve for x
    x = 2,491,015,271,225.14/1,811,978.61
  6. Step 6: Final answer
    x = 1,374,748.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.