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Finding the Fourth Proportional to 390,006.31, 585,009.47 and 94,518.31

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Solution

The fourth proportional to 390,006.31, 585,009.47 and 94,518.31 is: 141,777.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,006.31 : 585,009.47 = 94,518.31 : x
  2. Step 2: Convert to fraction form
    390,006.31/585,009.47 = 94,518.31/x
  3. Step 3: Cross multiply
    390,006.31x = 585,009.47 × 94,518.31
  4. Step 4: Simplify right side
    390,006.31x = 55,294,106,438.40
  5. Step 5: Solve for x
    x = 55,294,106,438.40/390,006.31
  6. Step 6: Final answer
    x = 141,777.47

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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.