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Finding the Fourth Proportional to 457,388.10, 685,950.93 and 318,032.46

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Solution

The fourth proportional to 457,388.10, 685,950.93 and 318,032.46 is: 476,957.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,388.10 : 685,950.93 = 318,032.46 : x
  2. Step 2: Convert to fraction form
    457,388.10/685,950.93 = 318,032.46/x
  3. Step 3: Cross multiply
    457,388.10x = 685,950.93 × 318,032.46
  4. Step 4: Simplify right side
    457,388.10x = 218,154,661,707.19
  5. Step 5: Solve for x
    x = 218,154,661,707.19/457,388.10
  6. Step 6: Final answer
    x = 476,957.45

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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.