Home / 1,388,252.60-2,082,378.90-390,980.60

Finding the Fourth Proportional to 1,388,252.60, 2,082,378.90 and 390,980.60

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Solution

The fourth proportional to 1,388,252.60, 2,082,378.90 and 390,980.60 is: 586,470.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,252.60 : 2,082,378.90 = 390,980.60 : x
  2. Step 2: Convert to fraction form
    1,388,252.60/2,082,378.90 = 390,980.60/x
  3. Step 3: Cross multiply
    1,388,252.60x = 2,082,378.90 × 390,980.60
  4. Step 4: Simplify right side
    1,388,252.60x = 814,169,751,749.34
  5. Step 5: Solve for x
    x = 814,169,751,749.34/1,388,252.60
  6. Step 6: Final answer
    x = 586,470.90

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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.