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Finding the Fourth Proportional to 1,019,719.40, 1,529,579.10 and 853,831.40

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Solution

The fourth proportional to 1,019,719.40, 1,529,579.10 and 853,831.40 is: 1,280,747.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019,719.40 : 1,529,579.10 = 853,831.40 : x
  2. Step 2: Convert to fraction form
    1,019,719.40/1,529,579.10 = 853,831.40/x
  3. Step 3: Cross multiply
    1,019,719.40x = 1,529,579.10 × 853,831.40
  4. Step 4: Simplify right side
    1,019,719.40x = 1,306,002,664,363.74
  5. Step 5: Solve for x
    x = 1,306,002,664,363.74/1,019,719.40
  6. Step 6: Final answer
    x = 1,280,747.10

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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.