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Finding the Fourth Proportional to 406,444.20, 609,666.30 and 398,668.20

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Solution

The fourth proportional to 406,444.20, 609,666.30 and 398,668.20 is: 598,002.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,444.20 : 609,666.30 = 398,668.20 : x
  2. Step 2: Convert to fraction form
    406,444.20/609,666.30 = 398,668.20/x
  3. Step 3: Cross multiply
    406,444.20x = 609,666.30 × 398,668.20
  4. Step 4: Simplify right side
    406,444.20x = 243,054,566,421.66
  5. Step 5: Solve for x
    x = 243,054,566,421.66/406,444.20
  6. Step 6: Final answer
    x = 598,002.30

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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.