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Finding the Fourth Proportional to 290,559.80, 435,839.70 and 103,503.80

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Solution

The fourth proportional to 290,559.80, 435,839.70 and 103,503.80 is: 155,255.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,559.80 : 435,839.70 = 103,503.80 : x
  2. Step 2: Convert to fraction form
    290,559.80/435,839.70 = 103,503.80/x
  3. Step 3: Cross multiply
    290,559.80x = 435,839.70 × 103,503.80
  4. Step 4: Simplify right side
    290,559.80x = 45,111,065,140.86
  5. Step 5: Solve for x
    x = 45,111,065,140.86/290,559.80
  6. Step 6: Final answer
    x = 155,255.70

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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.