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Finding the Fourth Proportional to 406,929.20, 610,393.80 and 265,211.60

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Solution

The fourth proportional to 406,929.20, 610,393.80 and 265,211.60 is: 397,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,929.20 : 610,393.80 = 265,211.60 : x
  2. Step 2: Convert to fraction form
    406,929.20/610,393.80 = 265,211.60/x
  3. Step 3: Cross multiply
    406,929.20x = 610,393.80 × 265,211.60
  4. Step 4: Simplify right side
    406,929.20x = 161,883,516,328.08
  5. Step 5: Solve for x
    x = 161,883,516,328.08/406,929.20
  6. Step 6: Final answer
    x = 397,817.40

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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.