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Finding the Fourth Proportional to 726,892.80, 1,089,172.80 and 684,902.40

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Solution

The fourth proportional to 726,892.80, 1,089,172.80 and 684,902.40 is: 1,026,254.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,892.80 : 1,089,172.80 = 684,902.40 : x
  2. Step 2: Convert to fraction form
    726,892.80/1,089,172.80 = 684,902.40/x
  3. Step 3: Cross multiply
    726,892.80x = 1,089,172.80 × 684,902.40
  4. Step 4: Simplify right side
    726,892.80x = 745,977,064,734.72
  5. Step 5: Solve for x
    x = 745,977,064,734.72/726,892.80
  6. Step 6: Final answer
    x = 1,026,254.58

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1.5x scale

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.