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Finding the Fourth Proportional to 578,781.46, 798,995.64 and 385,510.78

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Solution

The fourth proportional to 578,781.46, 798,995.64 and 385,510.78 is: 532,189.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,781.46 : 798,995.64 = 385,510.78 : x
  2. Step 2: Convert to fraction form
    578,781.46/798,995.64 = 385,510.78/x
  3. Step 3: Cross multiply
    578,781.46x = 798,995.64 × 385,510.78
  4. Step 4: Simplify right side
    578,781.46x = 308,021,432,393.00
  5. Step 5: Solve for x
    x = 308,021,432,393.00/578,781.46
  6. Step 6: Final answer
    x = 532,189.53

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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.