Home / 874,835.78-1,312,253.69-209,987.78

Finding the Fourth Proportional to 874,835.78, 1,312,253.69 and 209,987.78

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Solution

The fourth proportional to 874,835.78, 1,312,253.69 and 209,987.78 is: 314,981.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,835.78 : 1,312,253.69 = 209,987.78 : x
  2. Step 2: Convert to fraction form
    874,835.78/1,312,253.69 = 209,987.78/x
  3. Step 3: Cross multiply
    874,835.78x = 1,312,253.69 × 209,987.78
  4. Step 4: Simplify right side
    874,835.78x = 275,557,239,159.91
  5. Step 5: Solve for x
    x = 275,557,239,159.91/874,835.78
  6. Step 6: Final answer
    x = 314,981.67

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Double scale
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Similar ratio
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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.