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Finding the Fourth Proportional to 317,628.98, 438,328.85 and 174,398.30

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Solution

The fourth proportional to 317,628.98, 438,328.85 and 174,398.30 is: 240,670.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,628.98 : 438,328.85 = 174,398.30 : x
  2. Step 2: Convert to fraction form
    317,628.98/438,328.85 = 174,398.30/x
  3. Step 3: Cross multiply
    317,628.98x = 438,328.85 × 174,398.30
  4. Step 4: Simplify right side
    317,628.98x = 76,443,803,217.32
  5. Step 5: Solve for x
    x = 76,443,803,217.32/317,628.98
  6. Step 6: Final answer
    x = 240,670.12

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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.