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Finding the Fourth Proportional to 1,225,751.85, 1,837,034.88 and 685,985.67

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Solution

The fourth proportional to 1,225,751.85, 1,837,034.88 and 685,985.67 is: 1,028,087.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,751.85 : 1,837,034.88 = 685,985.67 : x
  2. Step 2: Convert to fraction form
    1,225,751.85/1,837,034.88 = 685,985.67/x
  3. Step 3: Cross multiply
    1,225,751.85x = 1,837,034.88 × 685,985.67
  4. Step 4: Simplify right side
    1,225,751.85x = 1,260,179,602,970.17
  5. Step 5: Solve for x
    x = 1,260,179,602,970.17/1,225,751.85
  6. Step 6: Final answer
    x = 1,028,087.05

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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.