Home / 679,899.69-1,019,389.46-380,586.87

Finding the Fourth Proportional to 679,899.69, 1,019,389.46 and 380,586.87

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Solution

The fourth proportional to 679,899.69, 1,019,389.46 and 380,586.87 is: 570,622.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,899.69 : 1,019,389.46 = 380,586.87 : x
  2. Step 2: Convert to fraction form
    679,899.69/1,019,389.46 = 380,586.87/x
  3. Step 3: Cross multiply
    679,899.69x = 1,019,389.46 × 380,586.87
  4. Step 4: Simplify right side
    679,899.69x = 387,966,241,989.46
  5. Step 5: Solve for x
    x = 387,966,241,989.46/679,899.69
  6. Step 6: Final answer
    x = 570,622.77

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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.