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Finding the Fourth Proportional to 397,985.73, 549,230.76 and 216,705.30

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Solution

The fourth proportional to 397,985.73, 549,230.76 and 216,705.30 is: 299,059.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,985.73 : 549,230.76 = 216,705.30 : x
  2. Step 2: Convert to fraction form
    397,985.73/549,230.76 = 216,705.30/x
  3. Step 3: Cross multiply
    397,985.73x = 549,230.76 × 216,705.30
  4. Step 4: Simplify right side
    397,985.73x = 119,021,216,615.03
  5. Step 5: Solve for x
    x = 119,021,216,615.03/397,985.73
  6. Step 6: Final answer
    x = 299,059.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.