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Finding the Fourth Proportional to 398,317.34, 549,670.98 and 217,030.76

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Solution

The fourth proportional to 398,317.34, 549,670.98 and 217,030.76 is: 299,498.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,317.34 : 549,670.98 = 217,030.76 : x
  2. Step 2: Convert to fraction form
    398,317.34/549,670.98 = 217,030.76/x
  3. Step 3: Cross multiply
    398,317.34x = 549,670.98 × 217,030.76
  4. Step 4: Simplify right side
    398,317.34x = 119,295,507,790.99
  5. Step 5: Solve for x
    x = 119,295,507,790.99/398,317.34
  6. Step 6: Final answer
    x = 299,498.66

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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.