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Finding the Fourth Proportional to 660,319.60, 990,187.80 and 260,827.60

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Solution

The fourth proportional to 660,319.60, 990,187.80 and 260,827.60 is: 391,126.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,319.60 : 990,187.80 = 260,827.60 : x
  2. Step 2: Convert to fraction form
    660,319.60/990,187.80 = 260,827.60/x
  3. Step 3: Cross multiply
    660,319.60x = 990,187.80 × 260,827.60
  4. Step 4: Simplify right side
    660,319.60x = 258,268,307,423.28
  5. Step 5: Solve for x
    x = 258,268,307,423.28/660,319.60
  6. Step 6: Final answer
    x = 391,126.22

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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.