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Finding the Fourth Proportional to 338,688.80, 507,514.80 and 320,026.40

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Solution

The fourth proportional to 338,688.80, 507,514.80 and 320,026.40 is: 479,549.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,688.80 : 507,514.80 = 320,026.40 : x
  2. Step 2: Convert to fraction form
    338,688.80/507,514.80 = 320,026.40/x
  3. Step 3: Cross multiply
    338,688.80x = 507,514.80 × 320,026.40
  4. Step 4: Simplify right side
    338,688.80x = 162,418,134,390.72
  5. Step 5: Solve for x
    x = 162,418,134,390.72/338,688.80
  6. Step 6: Final answer
    x = 479,549.76

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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.