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Finding the Fourth Proportional to 660,039.70, 989,865.15 and 260,547.70

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Solution

The fourth proportional to 660,039.70, 989,865.15 and 260,547.70 is: 390,744.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,039.70 : 989,865.15 = 260,547.70 : x
  2. Step 2: Convert to fraction form
    660,039.70/989,865.15 = 260,547.70/x
  3. Step 3: Cross multiply
    660,039.70x = 989,865.15 × 260,547.70
  4. Step 4: Simplify right side
    660,039.70x = 257,907,088,142.66
  5. Step 5: Solve for x
    x = 257,907,088,142.66/660,039.70
  6. Step 6: Final answer
    x = 390,744.81

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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.