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Finding the Fourth Proportional to 611,489.40, 917,234.10 and 424,865.40

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Solution

The fourth proportional to 611,489.40, 917,234.10 and 424,865.40 is: 637,298.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,489.40 : 917,234.10 = 424,865.40 : x
  2. Step 2: Convert to fraction form
    611,489.40/917,234.10 = 424,865.40/x
  3. Step 3: Cross multiply
    611,489.40x = 917,234.10 × 424,865.40
  4. Step 4: Simplify right side
    611,489.40x = 389,701,032,790.14
  5. Step 5: Solve for x
    x = 389,701,032,790.14/611,489.40
  6. Step 6: Final answer
    x = 637,298.10

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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.