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Finding the Fourth Proportional to 406,991.20, 610,486.80 and 361,890.40

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Solution

The fourth proportional to 406,991.20, 610,486.80 and 361,890.40 is: 542,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,991.20 : 610,486.80 = 361,890.40 : x
  2. Step 2: Convert to fraction form
    406,991.20/610,486.80 = 361,890.40/x
  3. Step 3: Cross multiply
    406,991.20x = 610,486.80 × 361,890.40
  4. Step 4: Simplify right side
    406,991.20x = 220,929,312,246.72
  5. Step 5: Solve for x
    x = 220,929,312,246.72/406,991.20
  6. Step 6: Final answer
    x = 542,835.60

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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.