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Finding the Fourth Proportional to 831,130.80, 1,243,585.80 and 551,194.80

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Solution

The fourth proportional to 831,130.80, 1,243,585.80 and 551,194.80 is: 824,729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,130.80 : 1,243,585.80 = 551,194.80 : x
  2. Step 2: Convert to fraction form
    831,130.80/1,243,585.80 = 551,194.80/x
  3. Step 3: Cross multiply
    831,130.80x = 1,243,585.80 × 551,194.80
  4. Step 4: Simplify right side
    831,130.80x = 685,458,026,313.84
  5. Step 5: Solve for x
    x = 685,458,026,313.84/831,130.80
  6. Step 6: Final answer
    x = 824,729.42

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Double scale
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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.