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Finding the Fourth Proportional to 710,281.18, 980,171.71 and 387,992.71

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Solution

The fourth proportional to 710,281.18, 980,171.71 and 387,992.71 is: 535,421.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,281.18 : 980,171.71 = 387,992.71 : x
  2. Step 2: Convert to fraction form
    710,281.18/980,171.71 = 387,992.71/x
  3. Step 3: Cross multiply
    710,281.18x = 980,171.71 × 387,992.71
  4. Step 4: Simplify right side
    710,281.18x = 380,299,478,028.23
  5. Step 5: Solve for x
    x = 380,299,478,028.23/710,281.18
  6. Step 6: Final answer
    x = 535,421.03

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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.