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Finding the Fourth Proportional to 549,661.20, 824,011.80 and 212,931.60

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Solution

The fourth proportional to 549,661.20, 824,011.80 and 212,931.60 is: 319,211.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,661.20 : 824,011.80 = 212,931.60 : x
  2. Step 2: Convert to fraction form
    549,661.20/824,011.80 = 212,931.60/x
  3. Step 3: Cross multiply
    549,661.20x = 824,011.80 × 212,931.60
  4. Step 4: Simplify right side
    549,661.20x = 175,458,150,992.88
  5. Step 5: Solve for x
    x = 175,458,150,992.88/549,661.20
  6. Step 6: Final answer
    x = 319,211.45

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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.