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Finding the Fourth Proportional to 710,218.28, 980,094.70 and 387,928.28

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Solution

The fourth proportional to 710,218.28, 980,094.70 and 387,928.28 is: 535,337.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,218.28 : 980,094.70 = 387,928.28 : x
  2. Step 2: Convert to fraction form
    710,218.28/980,094.70 = 387,928.28/x
  3. Step 3: Cross multiply
    710,218.28x = 980,094.70 × 387,928.28
  4. Step 4: Simplify right side
    710,218.28x = 380,206,451,208.12
  5. Step 5: Solve for x
    x = 380,206,451,208.12/710,218.28
  6. Step 6: Final answer
    x = 535,337.46

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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.