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Finding the Fourth Proportional to 713,791.18, 985,095.02 and 391,564.07

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Solution

The fourth proportional to 713,791.18, 985,095.02 and 391,564.07 is: 540,393.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,791.18 : 985,095.02 = 391,564.07 : x
  2. Step 2: Convert to fraction form
    713,791.18/985,095.02 = 391,564.07/x
  3. Step 3: Cross multiply
    713,791.18x = 985,095.02 × 391,564.07
  4. Step 4: Simplify right side
    713,791.18x = 385,727,811,421.37
  5. Step 5: Solve for x
    x = 385,727,811,421.37/713,791.18
  6. Step 6: Final answer
    x = 540,393.08

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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.