Home / 280,368.09-420,558.08-100,465.25

Finding the Fourth Proportional to 280,368.09, 420,558.08 and 100,465.25

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Solution

The fourth proportional to 280,368.09, 420,558.08 and 100,465.25 is: 150,700.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,368.09 : 420,558.08 = 100,465.25 : x
  2. Step 2: Convert to fraction form
    280,368.09/420,558.08 = 100,465.25/x
  3. Step 3: Cross multiply
    280,368.09x = 420,558.08 × 100,465.25
  4. Step 4: Simplify right side
    280,368.09x = 42,251,470,041.60
  5. Step 5: Solve for x
    x = 42,251,470,041.60/280,368.09
  6. Step 6: Final answer
    x = 150,700.00

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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.