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Finding the Fourth Proportional to 626,609.84, 864,722.61 and 340,129.85

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Solution

The fourth proportional to 626,609.84, 864,722.61 and 340,129.85 is: 469,379.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,609.84 : 864,722.61 = 340,129.85 : x
  2. Step 2: Convert to fraction form
    626,609.84/864,722.61 = 340,129.85/x
  3. Step 3: Cross multiply
    626,609.84x = 864,722.61 × 340,129.85
  4. Step 4: Simplify right side
    626,609.84x = 294,117,967,307.30
  5. Step 5: Solve for x
    x = 294,117,967,307.30/626,609.84
  6. Step 6: Final answer
    x = 469,379.75

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.