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Finding the Fourth Proportional to 710,736.90, 980,816.96 and 388,447.01

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Solution

The fourth proportional to 710,736.90, 980,816.96 and 388,447.01 is: 536,056.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,736.90 : 980,816.96 = 388,447.01 : x
  2. Step 2: Convert to fraction form
    710,736.90/980,816.96 = 388,447.01/x
  3. Step 3: Cross multiply
    710,736.90x = 980,816.96 × 388,447.01
  4. Step 4: Simplify right side
    710,736.90x = 380,995,411,536.32
  5. Step 5: Solve for x
    x = 380,995,411,536.32/710,736.90
  6. Step 6: Final answer
    x = 536,056.89

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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.