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Finding the Fourth Proportional to 1,916,903.30, 2,872,912.80 and 1,018,775.30

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Solution

The fourth proportional to 1,916,903.30, 2,872,912.80 and 1,018,775.30 is: 1,526,865.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916,903.30 : 2,872,912.80 = 1,018,775.30 : x
  2. Step 2: Convert to fraction form
    1,916,903.30/2,872,912.80 = 1,018,775.30/x
  3. Step 3: Cross multiply
    1,916,903.30x = 2,872,912.80 × 1,018,775.30
  4. Step 4: Simplify right side
    1,916,903.30x = 2,926,852,599,693.84
  5. Step 5: Solve for x
    x = 2,926,852,599,693.84/1,916,903.30
  6. Step 6: Final answer
    x = 1,526,865.02

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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.