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Finding the Fourth Proportional to 338,628.80, 509,114.40 and 316,702.40

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Solution

The fourth proportional to 338,628.80, 509,114.40 and 316,702.40 is: 476,148.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,628.80 : 509,114.40 = 316,702.40 : x
  2. Step 2: Convert to fraction form
    338,628.80/509,114.40 = 316,702.40/x
  3. Step 3: Cross multiply
    338,628.80x = 509,114.40 × 316,702.40
  4. Step 4: Simplify right side
    338,628.80x = 161,237,752,354.56
  5. Step 5: Solve for x
    x = 161,237,752,354.56/338,628.80
  6. Step 6: Final answer
    x = 476,148.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.