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Finding the Fourth Proportional to 459,618.60, 689,816.70 and 207,287.40

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Solution

The fourth proportional to 459,618.60, 689,816.70 and 207,287.40 is: 311,106.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,618.60 : 689,816.70 = 207,287.40 : x
  2. Step 2: Convert to fraction form
    459,618.60/689,816.70 = 207,287.40/x
  3. Step 3: Cross multiply
    459,618.60x = 689,816.70 × 207,287.40
  4. Step 4: Simplify right side
    459,618.60x = 142,990,310,219.58
  5. Step 5: Solve for x
    x = 142,990,310,219.58/459,618.60
  6. Step 6: Final answer
    x = 311,106.45

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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.