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Finding the Fourth Proportional to 338,328.80, 506,974.80 and 319,666.40

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Solution

The fourth proportional to 338,328.80, 506,974.80 and 319,666.40 is: 479,009.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,328.80 : 506,974.80 = 319,666.40 : x
  2. Step 2: Convert to fraction form
    338,328.80/506,974.80 = 319,666.40/x
  3. Step 3: Cross multiply
    338,328.80x = 506,974.80 × 319,666.40
  4. Step 4: Simplify right side
    338,328.80x = 162,062,809,206.72
  5. Step 5: Solve for x
    x = 162,062,809,206.72/338,328.80
  6. Step 6: Final answer
    x = 479,009.80

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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.