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Finding the Fourth Proportional to 710,214.78, 980,089.87 and 387,924.78

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Solution

The fourth proportional to 710,214.78, 980,089.87 and 387,924.78 is: 535,332.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,214.78 : 980,089.87 = 387,924.78 : x
  2. Step 2: Convert to fraction form
    710,214.78/980,089.87 = 387,924.78/x
  3. Step 3: Cross multiply
    710,214.78x = 980,089.87 × 387,924.78
  4. Step 4: Simplify right side
    710,214.78x = 380,201,147,199.98
  5. Step 5: Solve for x
    x = 380,201,147,199.98/710,214.78
  6. Step 6: Final answer
    x = 535,332.63

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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.