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Finding the Fourth Proportional to 394,710.30, 592,065.45 and 315,978.30

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Solution

The fourth proportional to 394,710.30, 592,065.45 and 315,978.30 is: 473,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,710.30 : 592,065.45 = 315,978.30 : x
  2. Step 2: Convert to fraction form
    394,710.30/592,065.45 = 315,978.30/x
  3. Step 3: Cross multiply
    394,710.30x = 592,065.45 × 315,978.30
  4. Step 4: Simplify right side
    394,710.30x = 187,079,834,379.74
  5. Step 5: Solve for x
    x = 187,079,834,379.74/394,710.30
  6. Step 6: Final answer
    x = 473,967.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.