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Finding the Fourth Proportional to 429,237.54, 643,870.01 and 215,889.01

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Solution

The fourth proportional to 429,237.54, 643,870.01 and 215,889.01 is: 323,840.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,237.54 : 643,870.01 = 215,889.01 : x
  2. Step 2: Convert to fraction form
    429,237.54/643,870.01 = 215,889.01/x
  3. Step 3: Cross multiply
    429,237.54x = 643,870.01 × 215,889.01
  4. Step 4: Simplify right side
    429,237.54x = 139,004,457,957.64
  5. Step 5: Solve for x
    x = 139,004,457,957.64/429,237.54
  6. Step 6: Final answer
    x = 323,840.40

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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.