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Finding the Fourth Proportional to 710,440.46, 980,421.94 and 388,170.52

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Solution

The fourth proportional to 710,440.46, 980,421.94 and 388,170.52 is: 535,683.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,440.46 : 980,421.94 = 388,170.52 : x
  2. Step 2: Convert to fraction form
    710,440.46/980,421.94 = 388,170.52/x
  3. Step 3: Cross multiply
    710,440.46x = 980,421.94 × 388,170.52
  4. Step 4: Simplify right side
    710,440.46x = 380,570,894,269.21
  5. Step 5: Solve for x
    x = 380,570,894,269.21/710,440.46
  6. Step 6: Final answer
    x = 535,683.02

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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.