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Finding the Fourth Proportional to 828,672.30, 1,243,008.45 and 429,435.45

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Solution

The fourth proportional to 828,672.30, 1,243,008.45 and 429,435.45 is: 644,153.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,672.30 : 1,243,008.45 = 429,435.45 : x
  2. Step 2: Convert to fraction form
    828,672.30/1,243,008.45 = 429,435.45/x
  3. Step 3: Cross multiply
    828,672.30x = 1,243,008.45 × 429,435.45
  4. Step 4: Simplify right side
    828,672.30x = 533,791,893,079.55
  5. Step 5: Solve for x
    x = 533,791,893,079.55/828,672.30
  6. Step 6: Final answer
    x = 644,153.18

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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.