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Finding the Fourth Proportional to 660,028.67, 990,459.49 and 280,948.81

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Solution

The fourth proportional to 660,028.67, 990,459.49 and 280,948.81 is: 421,600.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,028.67 : 990,459.49 = 280,948.81 : x
  2. Step 2: Convert to fraction form
    660,028.67/990,459.49 = 280,948.81/x
  3. Step 3: Cross multiply
    660,028.67x = 990,459.49 × 280,948.81
  4. Step 4: Simplify right side
    660,028.67x = 278,268,415,068.71
  5. Step 5: Solve for x
    x = 278,268,415,068.71/660,028.67
  6. Step 6: Final answer
    x = 421,600.50

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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.