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Finding the Fourth Proportional to 317,689.35, 438,412.50 and 172,495.35

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Solution

The fourth proportional to 317,689.35, 438,412.50 and 172,495.35 is: 238,044.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,689.35 : 438,412.50 = 172,495.35 : x
  2. Step 2: Convert to fraction form
    317,689.35/438,412.50 = 172,495.35/x
  3. Step 3: Cross multiply
    317,689.35x = 438,412.50 × 172,495.35
  4. Step 4: Simplify right side
    317,689.35x = 75,624,117,631.88
  5. Step 5: Solve for x
    x = 75,624,117,631.88/317,689.35
  6. Step 6: Final answer
    x = 238,044.23

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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.