Home / 669,325.61-1,003,988.78-420,182.57

Finding the Fourth Proportional to 669,325.61, 1,003,988.78 and 420,182.57

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Solution

The fourth proportional to 669,325.61, 1,003,988.78 and 420,182.57 is: 630,274.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,325.61 : 1,003,988.78 = 420,182.57 : x
  2. Step 2: Convert to fraction form
    669,325.61/1,003,988.78 = 420,182.57/x
  3. Step 3: Cross multiply
    669,325.61x = 1,003,988.78 × 420,182.57
  4. Step 4: Simplify right side
    669,325.61x = 421,858,583,730.65
  5. Step 5: Solve for x
    x = 421,858,583,730.65/669,325.61
  6. Step 6: Final answer
    x = 630,274.08

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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.