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Finding the Fourth Proportional to 290,853.20, 436,279.80 and 288,779.60

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Solution

The fourth proportional to 290,853.20, 436,279.80 and 288,779.60 is: 433,169.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,853.20 : 436,279.80 = 288,779.60 : x
  2. Step 2: Convert to fraction form
    290,853.20/436,279.80 = 288,779.60/x
  3. Step 3: Cross multiply
    290,853.20x = 436,279.80 × 288,779.60
  4. Step 4: Simplify right side
    290,853.20x = 125,988,706,132.08
  5. Step 5: Solve for x
    x = 125,988,706,132.08/290,853.20
  6. Step 6: Final answer
    x = 433,169.40

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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.