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Finding the Fourth Proportional to 398,127.12, 549,415.44 and 219,279.12

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Solution

The fourth proportional to 398,127.12, 549,415.44 and 219,279.12 is: 302,605.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,127.12 : 549,415.44 = 219,279.12 : x
  2. Step 2: Convert to fraction form
    398,127.12/549,415.44 = 219,279.12/x
  3. Step 3: Cross multiply
    398,127.12x = 549,415.44 × 219,279.12
  4. Step 4: Simplify right side
    398,127.12x = 120,475,334,197.61
  5. Step 5: Solve for x
    x = 120,475,334,197.61/398,127.12
  6. Step 6: Final answer
    x = 302,605.19

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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.