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Finding the Fourth Proportional to 245,830.64, 339,220.32 and 138,398.72

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Solution

The fourth proportional to 245,830.64, 339,220.32 and 138,398.72 is: 190,975.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,830.64 : 339,220.32 = 138,398.72 : x
  2. Step 2: Convert to fraction form
    245,830.64/339,220.32 = 138,398.72/x
  3. Step 3: Cross multiply
    245,830.64x = 339,220.32 × 138,398.72
  4. Step 4: Simplify right side
    245,830.64x = 46,947,658,085.99
  5. Step 5: Solve for x
    x = 46,947,658,085.99/245,830.64
  6. Step 6: Final answer
    x = 190,975.62

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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.