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Finding the Fourth Proportional to 245,213.65, 338,404.80 and 137,783.35

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Solution

The fourth proportional to 245,213.65, 338,404.80 and 137,783.35 is: 190,146.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,213.65 : 338,404.80 = 137,783.35 : x
  2. Step 2: Convert to fraction form
    245,213.65/338,404.80 = 137,783.35/x
  3. Step 3: Cross multiply
    245,213.65x = 338,404.80 × 137,783.35
  4. Step 4: Simplify right side
    245,213.65x = 46,626,547,000.08
  5. Step 5: Solve for x
    x = 46,626,547,000.08/245,213.65
  6. Step 6: Final answer
    x = 190,146.62

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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.