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Finding the Fourth Proportional to 405,643.10, 608,464.65 and 256,052.30

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Solution

The fourth proportional to 405,643.10, 608,464.65 and 256,052.30 is: 384,078.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,643.10 : 608,464.65 = 256,052.30 : x
  2. Step 2: Convert to fraction form
    405,643.10/608,464.65 = 256,052.30/x
  3. Step 3: Cross multiply
    405,643.10x = 608,464.65 × 256,052.30
  4. Step 4: Simplify right side
    405,643.10x = 155,798,773,101.20
  5. Step 5: Solve for x
    x = 155,798,773,101.20/405,643.10
  6. Step 6: Final answer
    x = 384,078.45

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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.