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Finding the Fourth Proportional to 403,421.60, 606,444.60 and 285,906.80

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Solution

The fourth proportional to 403,421.60, 606,444.60 and 285,906.80 is: 429,790.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,421.60 : 606,444.60 = 285,906.80 : x
  2. Step 2: Convert to fraction form
    403,421.60/606,444.60 = 285,906.80/x
  3. Step 3: Cross multiply
    403,421.60x = 606,444.60 × 285,906.80
  4. Step 4: Simplify right side
    403,421.60x = 173,386,634,963.28
  5. Step 5: Solve for x
    x = 173,386,634,963.28/403,421.60
  6. Step 6: Final answer
    x = 429,790.16

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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.