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Finding the Fourth Proportional to 290,304.80, 434,582.40 and 255,312.80

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Solution

The fourth proportional to 290,304.80, 434,582.40 and 255,312.80 is: 382,199.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,304.80 : 434,582.40 = 255,312.80 : x
  2. Step 2: Convert to fraction form
    290,304.80/434,582.40 = 255,312.80/x
  3. Step 3: Cross multiply
    290,304.80x = 434,582.40 × 255,312.80
  4. Step 4: Simplify right side
    290,304.80x = 110,954,449,374.72
  5. Step 5: Solve for x
    x = 110,954,449,374.72/290,304.80
  6. Step 6: Final answer
    x = 382,199.84

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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.