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Finding the Fourth Proportional to 918,420.90, 1,376,323.03 and 676,633.32

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Solution

The fourth proportional to 918,420.90, 1,376,323.03 and 676,633.32 is: 1,013,986.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,420.90 : 1,376,323.03 = 676,633.32 : x
  2. Step 2: Convert to fraction form
    918,420.90/1,376,323.03 = 676,633.32/x
  3. Step 3: Cross multiply
    918,420.90x = 1,376,323.03 × 676,633.32
  4. Step 4: Simplify right side
    918,420.90x = 931,266,021,181.36
  5. Step 5: Solve for x
    x = 931,266,021,181.36/918,420.90
  6. Step 6: Final answer
    x = 1,013,986.09

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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.