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Finding the Fourth Proportional to 405,090.80, 607,636.20 and 310,612.40

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Solution

The fourth proportional to 405,090.80, 607,636.20 and 310,612.40 is: 465,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,090.80 : 607,636.20 = 310,612.40 : x
  2. Step 2: Convert to fraction form
    405,090.80/607,636.20 = 310,612.40/x
  3. Step 3: Cross multiply
    405,090.80x = 607,636.20 × 310,612.40
  4. Step 4: Simplify right side
    405,090.80x = 188,739,338,408.88
  5. Step 5: Solve for x
    x = 188,739,338,408.88/405,090.80
  6. Step 6: Final answer
    x = 465,918.60

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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.