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Finding the Fourth Proportional to 369,780.86, 509,834.84 and 308,615.34

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Solution

The fourth proportional to 369,780.86, 509,834.84 and 308,615.34 is: 425,502.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,780.86 : 509,834.84 = 308,615.34 : x
  2. Step 2: Convert to fraction form
    369,780.86/509,834.84 = 308,615.34/x
  3. Step 3: Cross multiply
    369,780.86x = 509,834.84 × 308,615.34
  4. Step 4: Simplify right side
    369,780.86x = 157,342,852,490.45
  5. Step 5: Solve for x
    x = 157,342,852,490.45/369,780.86
  6. Step 6: Final answer
    x = 425,502.97

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1.5x scale

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.