Home / 439,345,012.40-659,017,518.60-390,027,287.60

Finding the Fourth Proportional to 439,345,012.40, 659,017,518.60 and 390,027,287.60

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Solution

The fourth proportional to 439,345,012.40, 659,017,518.60 and 390,027,287.60 is: 585,040,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,345,012.40 : 659,017,518.60 = 390,027,287.60 : x
  2. Step 2: Convert to fraction form
    439,345,012.40/659,017,518.60 = 390,027,287.60/x
  3. Step 3: Cross multiply
    439,345,012.40x = 659,017,518.60 × 390,027,287.60
  4. Step 4: Simplify right side
    439,345,012.40x = 257,034,815,260,440,576
  5. Step 5: Solve for x
    x = 257,034,815,260,440,576/439,345,012.40
  6. Step 6: Final answer
    x = 585,040,931.40

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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.