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Finding the Fourth Proportional to 710,781.03, 980,904.20 and 388,512.81

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Solution

The fourth proportional to 710,781.03, 980,904.20 and 388,512.81 is: 536,162.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,781.03 : 980,904.20 = 388,512.81 : x
  2. Step 2: Convert to fraction form
    710,781.03/980,904.20 = 388,512.81/x
  3. Step 3: Cross multiply
    710,781.03x = 980,904.20 × 388,512.81
  4. Step 4: Simplify right side
    710,781.03x = 381,093,845,140.24
  5. Step 5: Solve for x
    x = 381,093,845,140.24/710,781.03
  6. Step 6: Final answer
    x = 536,162.09

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1.5x scale

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.