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Finding the Fourth Proportional to 398,501.01, 549,927.81 and 217,212.93

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Solution

The fourth proportional to 398,501.01, 549,927.81 and 217,212.93 is: 299,751.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,501.01 : 549,927.81 = 217,212.93 : x
  2. Step 2: Convert to fraction form
    398,501.01/549,927.81 = 217,212.93/x
  3. Step 3: Cross multiply
    398,501.01x = 549,927.81 × 217,212.93
  4. Step 4: Simplify right side
    398,501.01x = 119,451,430,898.58
  5. Step 5: Solve for x
    x = 119,451,430,898.58/398,501.01
  6. Step 6: Final answer
    x = 299,751.89

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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.