Home / 1,189,315.60-1,783,973.40-390,623.20

Finding the Fourth Proportional to 1,189,315.60, 1,783,973.40 and 390,623.20

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Solution

The fourth proportional to 1,189,315.60, 1,783,973.40 and 390,623.20 is: 585,934.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,315.60 : 1,783,973.40 = 390,623.20 : x
  2. Step 2: Convert to fraction form
    1,189,315.60/1,783,973.40 = 390,623.20/x
  3. Step 3: Cross multiply
    1,189,315.60x = 1,783,973.40 × 390,623.20
  4. Step 4: Simplify right side
    1,189,315.60x = 696,861,398,222.88
  5. Step 5: Solve for x
    x = 696,861,398,222.88/1,189,315.60
  6. Step 6: Final answer
    x = 585,934.80

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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.