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Finding the Fourth Proportional to 953,287, 1,430,127.42 and 279,390.40

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Solution

The fourth proportional to 953,287, 1,430,127.42 and 279,390.40 is: 419,143.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    953,287 : 1,430,127.42 = 279,390.40 : x
  2. Step 2: Convert to fraction form
    953,287/1,430,127.42 = 279,390.40/x
  3. Step 3: Cross multiply
    953,287x = 1,430,127.42 × 279,390.40
  4. Step 4: Simplify right side
    953,287x = 399,563,871,924.77
  5. Step 5: Solve for x
    x = 399,563,871,924.77/953,287
  6. Step 6: Final answer
    x = 419,143.31

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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.