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Finding the Fourth Proportional to 696,670.90, 961,415.81 and 521,931.49

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Solution

The fourth proportional to 696,670.90, 961,415.81 and 521,931.49 is: 720,272.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,670.90 : 961,415.81 = 521,931.49 : x
  2. Step 2: Convert to fraction form
    696,670.90/961,415.81 = 521,931.49/x
  3. Step 3: Cross multiply
    696,670.90x = 961,415.81 × 521,931.49
  4. Step 4: Simplify right side
    696,670.90x = 501,793,186,222.86
  5. Step 5: Solve for x
    x = 501,793,186,222.86/696,670.90
  6. Step 6: Final answer
    x = 720,272.92

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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.