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Finding the Fourth Proportional to 398,130.40, 549,430.36 and 216,849.20

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Solution

The fourth proportional to 398,130.40, 549,430.36 and 216,849.20 is: 299,257.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,130.40 : 549,430.36 = 216,849.20 : x
  2. Step 2: Convert to fraction form
    398,130.40/549,430.36 = 216,849.20/x
  3. Step 3: Cross multiply
    398,130.40x = 549,430.36 × 216,849.20
  4. Step 4: Simplify right side
    398,130.40x = 119,143,534,021.71
  5. Step 5: Solve for x
    x = 119,143,534,021.71/398,130.40
  6. Step 6: Final answer
    x = 299,257.56

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