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Finding the Fourth Proportional to 1,279,643.60, 1,916,700.60 and 1,058,459.60

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Solution

The fourth proportional to 1,279,643.60, 1,916,700.60 and 1,058,459.60 is: 1,585,402.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,643.60 : 1,916,700.60 = 1,058,459.60 : x
  2. Step 2: Convert to fraction form
    1,279,643.60/1,916,700.60 = 1,058,459.60/x
  3. Step 3: Cross multiply
    1,279,643.60x = 1,916,700.60 × 1,058,459.60
  4. Step 4: Simplify right side
    1,279,643.60x = 2,028,750,150,395.76
  5. Step 5: Solve for x
    x = 2,028,750,150,395.76/1,279,643.60
  6. Step 6: Final answer
    x = 1,585,402.49

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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.