Home / 685,582.16-1,028,421.24-212,205.20

Finding the Fourth Proportional to 685,582.16, 1,028,421.24 and 212,205.20

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Solution

The fourth proportional to 685,582.16, 1,028,421.24 and 212,205.20 is: 318,322.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,582.16 : 1,028,421.24 = 212,205.20 : x
  2. Step 2: Convert to fraction form
    685,582.16/1,028,421.24 = 212,205.20/x
  3. Step 3: Cross multiply
    685,582.16x = 1,028,421.24 × 212,205.20
  4. Step 4: Simplify right side
    685,582.16x = 218,236,334,918.45
  5. Step 5: Solve for x
    x = 218,236,334,918.45/685,582.16
  6. Step 6: Final answer
    x = 318,322.66

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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.