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Finding the Fourth Proportional to 696,663.79, 961,399.44 and 390,756.52

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Solution

The fourth proportional to 696,663.79, 961,399.44 and 390,756.52 is: 539,245.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,663.79 : 961,399.44 = 390,756.52 : x
  2. Step 2: Convert to fraction form
    696,663.79/961,399.44 = 390,756.52/x
  3. Step 3: Cross multiply
    696,663.79x = 961,399.44 × 390,756.52
  4. Step 4: Simplify right side
    696,663.79x = 375,673,096,754.89
  5. Step 5: Solve for x
    x = 375,673,096,754.89/696,663.79
  6. Step 6: Final answer
    x = 539,245.91

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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.