Home / 280,314,328.60-420,471,492.90-165,428,594.20

Finding the Fourth Proportional to 280,314,328.60, 420,471,492.90 and 165,428,594.20

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Solution

The fourth proportional to 280,314,328.60, 420,471,492.90 and 165,428,594.20 is: 248,142,891.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,314,328.60 : 420,471,492.90 = 165,428,594.20 : x
  2. Step 2: Convert to fraction form
    280,314,328.60/420,471,492.90 = 165,428,594.20/x
  3. Step 3: Cross multiply
    280,314,328.60x = 420,471,492.90 × 165,428,594.20
  4. Step 4: Simplify right side
    280,314,328.60x = 69,558,007,971,622,272
  5. Step 5: Solve for x
    x = 69,558,007,971,622,272/280,314,328.60
  6. Step 6: Final answer
    x = 248,142,891.30

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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.