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Finding the Fourth Proportional to 696,005.28, 960,554.70 and 390,133.68

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Solution

The fourth proportional to 696,005.28, 960,554.70 and 390,133.68 is: 538,422.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,005.28 : 960,554.70 = 390,133.68 : x
  2. Step 2: Convert to fraction form
    696,005.28/960,554.70 = 390,133.68/x
  3. Step 3: Cross multiply
    696,005.28x = 960,554.70 × 390,133.68
  4. Step 4: Simplify right side
    696,005.28x = 374,744,739,952.30
  5. Step 5: Solve for x
    x = 374,744,739,952.30/696,005.28
  6. Step 6: Final answer
    x = 538,422.27

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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.