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Finding the Fourth Proportional to 710,465.92, 980,431.53 and 388,169.10

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Solution

The fourth proportional to 710,465.92, 980,431.53 and 388,169.10 is: 535,667.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,465.92 : 980,431.53 = 388,169.10 : x
  2. Step 2: Convert to fraction form
    710,465.92/980,431.53 = 388,169.10/x
  3. Step 3: Cross multiply
    710,465.92x = 980,431.53 × 388,169.10
  4. Step 4: Simplify right side
    710,465.92x = 380,573,224,611.72
  5. Step 5: Solve for x
    x = 380,573,224,611.72/710,465.92
  6. Step 6: Final answer
    x = 535,667.11

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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.