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Finding the Fourth Proportional to 405,421.48, 607,874.64 and 355,601.62

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Solution

The fourth proportional to 405,421.48, 607,874.64 and 355,601.62 is: 533,176.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,421.48 : 607,874.64 = 355,601.62 : x
  2. Step 2: Convert to fraction form
    405,421.48/607,874.64 = 355,601.62/x
  3. Step 3: Cross multiply
    405,421.48x = 607,874.64 × 355,601.62
  4. Step 4: Simplify right side
    405,421.48x = 216,161,206,740.92
  5. Step 5: Solve for x
    x = 216,161,206,740.92/405,421.48
  6. Step 6: Final answer
    x = 533,176.50

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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.