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Finding the Fourth Proportional to 406,421.20, 609,631.80 and 264,703.60

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Solution

The fourth proportional to 406,421.20, 609,631.80 and 264,703.60 is: 397,055.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,421.20 : 609,631.80 = 264,703.60 : x
  2. Step 2: Convert to fraction form
    406,421.20/609,631.80 = 264,703.60/x
  3. Step 3: Cross multiply
    406,421.20x = 609,631.80 × 264,703.60
  4. Step 4: Simplify right side
    406,421.20x = 161,371,732,134.48
  5. Step 5: Solve for x
    x = 161,371,732,134.48/406,421.20
  6. Step 6: Final answer
    x = 397,055.40

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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.