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Finding the Fourth Proportional to 831,142.80, 1,243,603.80 and 551,206.80

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Solution

The fourth proportional to 831,142.80, 1,243,603.80 and 551,206.80 is: 824,747.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,142.80 : 1,243,603.80 = 551,206.80 : x
  2. Step 2: Convert to fraction form
    831,142.80/1,243,603.80 = 551,206.80/x
  3. Step 3: Cross multiply
    831,142.80x = 1,243,603.80 × 551,206.80
  4. Step 4: Simplify right side
    831,142.80x = 685,482,871,065.84
  5. Step 5: Solve for x
    x = 685,482,871,065.84/831,142.80
  6. Step 6: Final answer
    x = 824,747.41

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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.