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Finding the Fourth Proportional to 305,302.51, 420,830.65 and 240,666.34

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Solution

The fourth proportional to 305,302.51, 420,830.65 and 240,666.34 is: 331,735.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,302.51 : 420,830.65 = 240,666.34 : x
  2. Step 2: Convert to fraction form
    305,302.51/420,830.65 = 240,666.34/x
  3. Step 3: Cross multiply
    305,302.51x = 420,830.65 × 240,666.34
  4. Step 4: Simplify right side
    305,302.51x = 101,279,772,295.32
  5. Step 5: Solve for x
    x = 101,279,772,295.32/305,302.51
  6. Step 6: Final answer
    x = 331,735.80

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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.