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Finding the Fourth Proportional to 660,063.70, 989,901.15 and 260,571.70

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Solution

The fourth proportional to 660,063.70, 989,901.15 and 260,571.70 is: 390,780.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,063.70 : 989,901.15 = 260,571.70 : x
  2. Step 2: Convert to fraction form
    660,063.70/989,901.15 = 260,571.70/x
  3. Step 3: Cross multiply
    660,063.70x = 989,901.15 × 260,571.70
  4. Step 4: Simplify right side
    660,063.70x = 257,940,225,487.46
  5. Step 5: Solve for x
    x = 257,940,225,487.46/660,063.70
  6. Step 6: Final answer
    x = 390,780.81

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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.