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Finding the Fourth Proportional to 626,780.60, 939,782.10 and 360,409.40

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Solution

The fourth proportional to 626,780.60, 939,782.10 and 360,409.40 is: 540,390.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,780.60 : 939,782.10 = 360,409.40 : x
  2. Step 2: Convert to fraction form
    626,780.60/939,782.10 = 360,409.40/x
  3. Step 3: Cross multiply
    626,780.60x = 939,782.10 × 360,409.40
  4. Step 4: Simplify right side
    626,780.60x = 338,706,302,791.74
  5. Step 5: Solve for x
    x = 338,706,302,791.74/626,780.60
  6. Step 6: Final answer
    x = 540,390.53

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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.