Home / 280,075.32-420,299.78-145,263.65

Finding the Fourth Proportional to 280,075.32, 420,299.78 and 145,263.65

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Solution

The fourth proportional to 280,075.32, 420,299.78 and 145,263.65 is: 217,992.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,075.32 : 420,299.78 = 145,263.65 : x
  2. Step 2: Convert to fraction form
    280,075.32/420,299.78 = 145,263.65/x
  3. Step 3: Cross multiply
    280,075.32x = 420,299.78 × 145,263.65
  4. Step 4: Simplify right side
    280,075.32x = 61,054,277,309.18
  5. Step 5: Solve for x
    x = 61,054,277,309.18/280,075.32
  6. Step 6: Final answer
    x = 217,992.35

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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.