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Finding the Fourth Proportional to 430,903.80, 646,355.70 and 218,327.40

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Solution

The fourth proportional to 430,903.80, 646,355.70 and 218,327.40 is: 327,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,903.80 : 646,355.70 = 218,327.40 : x
  2. Step 2: Convert to fraction form
    430,903.80/646,355.70 = 218,327.40/x
  3. Step 3: Cross multiply
    430,903.80x = 646,355.70 × 218,327.40
  4. Step 4: Simplify right side
    430,903.80x = 141,117,159,456.18
  5. Step 5: Solve for x
    x = 141,117,159,456.18/430,903.80
  6. Step 6: Final answer
    x = 327,491.10

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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.