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Finding the Fourth Proportional to 298,365.20, 447,547.80 and 172,221.20

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Solution

The fourth proportional to 298,365.20, 447,547.80 and 172,221.20 is: 258,331.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,365.20 : 447,547.80 = 172,221.20 : x
  2. Step 2: Convert to fraction form
    298,365.20/447,547.80 = 172,221.20/x
  3. Step 3: Cross multiply
    298,365.20x = 447,547.80 × 172,221.20
  4. Step 4: Simplify right side
    298,365.20x = 77,077,219,173.36
  5. Step 5: Solve for x
    x = 77,077,219,173.36/298,365.20
  6. Step 6: Final answer
    x = 258,331.80

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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.