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Finding the Fourth Proportional to 280,373.32, 420,129.25 and 190,298.89

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Solution

The fourth proportional to 280,373.32, 420,129.25 and 190,298.89 is: 285,155.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,373.32 : 420,129.25 = 190,298.89 : x
  2. Step 2: Convert to fraction form
    280,373.32/420,129.25 = 190,298.89/x
  3. Step 3: Cross multiply
    280,373.32x = 420,129.25 × 190,298.89
  4. Step 4: Simplify right side
    280,373.32x = 79,950,129,931.53
  5. Step 5: Solve for x
    x = 79,950,129,931.53/280,373.32
  6. Step 6: Final answer
    x = 285,155.98

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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.