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Finding the Fourth Proportional to 317,664.64, 438,374.28 and 174,430.72

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Solution

The fourth proportional to 317,664.64, 438,374.28 and 174,430.72 is: 240,712.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,664.64 : 438,374.28 = 174,430.72 : x
  2. Step 2: Convert to fraction form
    317,664.64/438,374.28 = 174,430.72/x
  3. Step 3: Cross multiply
    317,664.64x = 438,374.28 × 174,430.72
  4. Step 4: Simplify right side
    317,664.64x = 76,465,941,289.88
  5. Step 5: Solve for x
    x = 76,465,941,289.88/317,664.64
  6. Step 6: Final answer
    x = 240,712.79

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1.5x scale

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.