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Finding the Fourth Proportional to 660,355.84, 990,485.30 and 210,956.02

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Solution

The fourth proportional to 660,355.84, 990,485.30 and 210,956.02 is: 316,418.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,355.84 : 990,485.30 = 210,956.02 : x
  2. Step 2: Convert to fraction form
    660,355.84/990,485.30 = 210,956.02/x
  3. Step 3: Cross multiply
    660,355.84x = 990,485.30 × 210,956.02
  4. Step 4: Simplify right side
    660,355.84x = 208,948,836,756.51
  5. Step 5: Solve for x
    x = 208,948,836,756.51/660,355.84
  6. Step 6: Final answer
    x = 316,418.55

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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.