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Finding the Fourth Proportional to 660,313.60, 990,178.80 and 260,821.60

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Solution

The fourth proportional to 660,313.60, 990,178.80 and 260,821.60 is: 391,117.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,313.60 : 990,178.80 = 260,821.60 : x
  2. Step 2: Convert to fraction form
    660,313.60/990,178.80 = 260,821.60/x
  3. Step 3: Cross multiply
    660,313.60x = 990,178.80 × 260,821.60
  4. Step 4: Simplify right side
    660,313.60x = 258,260,018,902.08
  5. Step 5: Solve for x
    x = 258,260,018,902.08/660,313.60
  6. Step 6: Final answer
    x = 391,117.22

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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.