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Finding the Fourth Proportional to 710,788.36, 980,820.42 and 388,477.96

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Solution

The fourth proportional to 710,788.36, 980,820.42 and 388,477.96 is: 536,062.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,788.36 : 980,820.42 = 388,477.96 : x
  2. Step 2: Convert to fraction form
    710,788.36/980,820.42 = 388,477.96/x
  3. Step 3: Cross multiply
    710,788.36x = 980,820.42 × 388,477.96
  4. Step 4: Simplify right side
    710,788.36x = 381,027,115,887.94
  5. Step 5: Solve for x
    x = 381,027,115,887.94/710,788.36
  6. Step 6: Final answer
    x = 536,062.68

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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.