Home / 685,985.10-1,028,977.65-212,718.30

Finding the Fourth Proportional to 685,985.10, 1,028,977.65 and 212,718.30

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Solution

The fourth proportional to 685,985.10, 1,028,977.65 and 212,718.30 is: 319,077.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,985.10 : 1,028,977.65 = 212,718.30 : x
  2. Step 2: Convert to fraction form
    685,985.10/1,028,977.65 = 212,718.30/x
  3. Step 3: Cross multiply
    685,985.10x = 1,028,977.65 × 212,718.30
  4. Step 4: Simplify right side
    685,985.10x = 218,882,376,446.00
  5. Step 5: Solve for x
    x = 218,882,376,446.00/685,985.10
  6. Step 6: Final answer
    x = 319,077.45

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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.