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Finding the Fourth Proportional to 421,316.50, 581,342.03 and 249,241.72

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Solution

The fourth proportional to 421,316.50, 581,342.03 and 249,241.72 is: 343,909.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,316.50 : 581,342.03 = 249,241.72 : x
  2. Step 2: Convert to fraction form
    421,316.50/581,342.03 = 249,241.72/x
  3. Step 3: Cross multiply
    421,316.50x = 581,342.03 × 249,241.72
  4. Step 4: Simplify right side
    421,316.50x = 144,894,687,465.49
  5. Step 5: Solve for x
    x = 144,894,687,465.49/421,316.50
  6. Step 6: Final answer
    x = 343,909.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.