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Finding the Fourth Proportional to 279,938,532.60, 419,907,798.90 and 260,806,656.60

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Solution

The fourth proportional to 279,938,532.60, 419,907,798.90 and 260,806,656.60 is: 391,209,984.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,532.60 : 419,907,798.90 = 260,806,656.60 : x
  2. Step 2: Convert to fraction form
    279,938,532.60/419,907,798.90 = 260,806,656.60/x
  3. Step 3: Cross multiply
    279,938,532.60x = 419,907,798.90 × 260,806,656.60
  4. Step 4: Simplify right side
    279,938,532.60x = 109,514,749,111,374,144
  5. Step 5: Solve for x
    x = 109,514,749,111,374,144/279,938,532.60
  6. Step 6: Final answer
    x = 391,209,984.90

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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.