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Finding the Fourth Proportional to 872,518.40, 1,308,518.40 and 339,732.80

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Solution

The fourth proportional to 872,518.40, 1,308,518.40 and 339,732.80 is: 509,498.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,518.40 : 1,308,518.40 = 339,732.80 : x
  2. Step 2: Convert to fraction form
    872,518.40/1,308,518.40 = 339,732.80/x
  3. Step 3: Cross multiply
    872,518.40x = 1,308,518.40 × 339,732.80
  4. Step 4: Simplify right side
    872,518.40x = 444,546,619,883.52
  5. Step 5: Solve for x
    x = 444,546,619,883.52/872,518.40
  6. Step 6: Final answer
    x = 509,498.28

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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.