Home / 385,923.96-578,868.12-105,440.40

Finding the Fourth Proportional to 385,923.96, 578,868.12 and 105,440.40

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Solution

The fourth proportional to 385,923.96, 578,868.12 and 105,440.40 is: 158,155.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,923.96 : 578,868.12 = 105,440.40 : x
  2. Step 2: Convert to fraction form
    385,923.96/578,868.12 = 105,440.40/x
  3. Step 3: Cross multiply
    385,923.96x = 578,868.12 × 105,440.40
  4. Step 4: Simplify right side
    385,923.96x = 61,036,086,120.05
  5. Step 5: Solve for x
    x = 61,036,086,120.05/385,923.96
  6. Step 6: Final answer
    x = 158,155.73

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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.