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Finding the Fourth Proportional to 637,811.80, 956,717.70 and 401,421.40

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Solution

The fourth proportional to 637,811.80, 956,717.70 and 401,421.40 is: 602,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,811.80 : 956,717.70 = 401,421.40 : x
  2. Step 2: Convert to fraction form
    637,811.80/956,717.70 = 401,421.40/x
  3. Step 3: Cross multiply
    637,811.80x = 956,717.70 × 401,421.40
  4. Step 4: Simplify right side
    637,811.80x = 384,046,958,538.78
  5. Step 5: Solve for x
    x = 384,046,958,538.78/637,811.80
  6. Step 6: Final answer
    x = 602,132.10

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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.