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Finding the Fourth Proportional to 405,637.20, 608,455.80 and 264,632.40

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Solution

The fourth proportional to 405,637.20, 608,455.80 and 264,632.40 is: 396,948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,637.20 : 608,455.80 = 264,632.40 : x
  2. Step 2: Convert to fraction form
    405,637.20/608,455.80 = 264,632.40/x
  3. Step 3: Cross multiply
    405,637.20x = 608,455.80 × 264,632.40
  4. Step 4: Simplify right side
    405,637.20x = 161,017,118,647.92
  5. Step 5: Solve for x
    x = 161,017,118,647.92/405,637.20
  6. Step 6: Final answer
    x = 396,948.60

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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.