Home / 989,972.10-1,483,614.95-420,639.30

Finding the Fourth Proportional to 989,972.10, 1,483,614.95 and 420,639.30

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Solution

The fourth proportional to 989,972.10, 1,483,614.95 and 420,639.30 is: 630,388.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,972.10 : 1,483,614.95 = 420,639.30 : x
  2. Step 2: Convert to fraction form
    989,972.10/1,483,614.95 = 420,639.30/x
  3. Step 3: Cross multiply
    989,972.10x = 1,483,614.95 × 420,639.30
  4. Step 4: Simplify right side
    989,972.10x = 624,066,751,934.34
  5. Step 5: Solve for x
    x = 624,066,751,934.34/989,972.10
  6. Step 6: Final answer
    x = 630,388.22

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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.