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Finding the Fourth Proportional to 660,035.70, 989,859.15 and 260,543.70

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Solution

The fourth proportional to 660,035.70, 989,859.15 and 260,543.70 is: 390,738.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,035.70 : 989,859.15 = 260,543.70 : x
  2. Step 2: Convert to fraction form
    660,035.70/989,859.15 = 260,543.70/x
  3. Step 3: Cross multiply
    660,035.70x = 989,859.15 × 260,543.70
  4. Step 4: Simplify right side
    660,035.70x = 257,901,565,419.86
  5. Step 5: Solve for x
    x = 257,901,565,419.86/660,035.70
  6. Step 6: Final answer
    x = 390,738.81

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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.