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Finding the Fourth Proportional to 485,234.66, 728,369.58 and 429,429.71

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Solution

The fourth proportional to 485,234.66, 728,369.58 and 429,429.71 is: 644,602.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,234.66 : 728,369.58 = 429,429.71 : x
  2. Step 2: Convert to fraction form
    485,234.66/728,369.58 = 429,429.71/x
  3. Step 3: Cross multiply
    485,234.66x = 728,369.58 × 429,429.71
  4. Step 4: Simplify right side
    485,234.66x = 312,783,537,512.22
  5. Step 5: Solve for x
    x = 312,783,537,512.22/485,234.66
  6. Step 6: Final answer
    x = 644,602.63

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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.