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Finding the Fourth Proportional to 428,648.72, 591,688.32 and 292,585.28

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Solution

The fourth proportional to 428,648.72, 591,688.32 and 292,585.28 is: 403,872.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,648.72 : 591,688.32 = 292,585.28 : x
  2. Step 2: Convert to fraction form
    428,648.72/591,688.32 = 292,585.28/x
  3. Step 3: Cross multiply
    428,648.72x = 591,688.32 × 292,585.28
  4. Step 4: Simplify right side
    428,648.72x = 173,119,292,779.93
  5. Step 5: Solve for x
    x = 173,119,292,779.93/428,648.72
  6. Step 6: Final answer
    x = 403,872.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.