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Finding the Fourth Proportional to 642,858.76, 964,423.00 and 243,490.69

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Solution

The fourth proportional to 642,858.76, 964,423.00 and 243,490.69 is: 365,287.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,858.76 : 964,423.00 = 243,490.69 : x
  2. Step 2: Convert to fraction form
    642,858.76/964,423.00 = 243,490.69/x
  3. Step 3: Cross multiply
    642,858.76x = 964,423.00 × 243,490.69
  4. Step 4: Simplify right side
    642,858.76x = 234,828,021,113.14
  5. Step 5: Solve for x
    x = 234,828,021,113.14/642,858.76
  6. Step 6: Final answer
    x = 365,287.11

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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.