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Finding the Fourth Proportional to 317,521.80, 438,178.55 and 174,284.28

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Solution

The fourth proportional to 317,521.80, 438,178.55 and 174,284.28 is: 240,511.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,521.80 : 438,178.55 = 174,284.28 : x
  2. Step 2: Convert to fraction form
    317,521.80/438,178.55 = 174,284.28/x
  3. Step 3: Cross multiply
    317,521.80x = 438,178.55 × 174,284.28
  4. Step 4: Simplify right side
    317,521.80x = 76,367,632,226.77
  5. Step 5: Solve for x
    x = 76,367,632,226.77/317,521.80
  6. Step 6: Final answer
    x = 240,511.46

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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.