Home / 420,280.45-630,605.25-220,554.16

Finding the Fourth Proportional to 420,280.45, 630,605.25 and 220,554.16

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Solution

The fourth proportional to 420,280.45, 630,605.25 and 220,554.16 is: 330,928.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,280.45 : 630,605.25 = 220,554.16 : x
  2. Step 2: Convert to fraction form
    420,280.45/630,605.25 = 220,554.16/x
  3. Step 3: Cross multiply
    420,280.45x = 630,605.25 × 220,554.16
  4. Step 4: Simplify right side
    420,280.45x = 139,082,609,628.83
  5. Step 5: Solve for x
    x = 139,082,609,628.83/420,280.45
  6. Step 6: Final answer
    x = 330,928.10

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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.