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Finding the Fourth Proportional to 459,620.60, 689,430.90 and 310,321.40

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Solution

The fourth proportional to 459,620.60, 689,430.90 and 310,321.40 is: 465,482.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,620.60 : 689,430.90 = 310,321.40 : x
  2. Step 2: Convert to fraction form
    459,620.60/689,430.90 = 310,321.40/x
  3. Step 3: Cross multiply
    459,620.60x = 689,430.90 × 310,321.40
  4. Step 4: Simplify right side
    459,620.60x = 213,945,162,091.26
  5. Step 5: Solve for x
    x = 213,945,162,091.26/459,620.60
  6. Step 6: Final answer
    x = 465,482.10

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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.