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Finding the Fourth Proportional to 828,637.80, 1,243,612.80 and 323,440.80

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Solution

The fourth proportional to 828,637.80, 1,243,612.80 and 323,440.80 is: 485,417.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,637.80 : 1,243,612.80 = 323,440.80 : x
  2. Step 2: Convert to fraction form
    828,637.80/1,243,612.80 = 323,440.80/x
  3. Step 3: Cross multiply
    828,637.80x = 1,243,612.80 × 323,440.80
  4. Step 4: Simplify right side
    828,637.80x = 402,235,118,922.24
  5. Step 5: Solve for x
    x = 402,235,118,922.24/828,637.80
  6. Step 6: Final answer
    x = 485,417.29

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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.