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Finding the Fourth Proportional to 660,878.40, 990,760.32 and 286,619.52

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Solution

The fourth proportional to 660,878.40, 990,760.32 and 286,619.52 is: 429,687.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,878.40 : 990,760.32 = 286,619.52 : x
  2. Step 2: Convert to fraction form
    660,878.40/990,760.32 = 286,619.52/x
  3. Step 3: Cross multiply
    660,878.40x = 990,760.32 × 286,619.52
  4. Step 4: Simplify right side
    660,878.40x = 283,971,247,353.45
  5. Step 5: Solve for x
    x = 283,971,247,353.45/660,878.40
  6. Step 6: Final answer
    x = 429,687.59

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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.