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Finding the Fourth Proportional to 406,421.40, 609,632.10 and 246,989.10

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Solution

The fourth proportional to 406,421.40, 609,632.10 and 246,989.10 is: 370,483.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,421.40 : 609,632.10 = 246,989.10 : x
  2. Step 2: Convert to fraction form
    406,421.40/609,632.10 = 246,989.10/x
  3. Step 3: Cross multiply
    406,421.40x = 609,632.10 × 246,989.10
  4. Step 4: Simplify right side
    406,421.40x = 150,572,483,710.11
  5. Step 5: Solve for x
    x = 150,572,483,710.11/406,421.40
  6. Step 6: Final answer
    x = 370,483.65

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Similar ratio
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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.