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Finding the Fourth Proportional to 573,782.67, 791,820 and 319,128.39

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Solution

The fourth proportional to 573,782.67, 791,820 and 319,128.39 is: 440,397.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,782.67 : 791,820 = 319,128.39 : x
  2. Step 2: Convert to fraction form
    573,782.67/791,820 = 319,128.39/x
  3. Step 3: Cross multiply
    573,782.67x = 791,820 × 319,128.39
  4. Step 4: Simplify right side
    573,782.67x = 252,692,241,769.80
  5. Step 5: Solve for x
    x = 252,692,241,769.80/573,782.67
  6. Step 6: Final answer
    x = 440,397.13

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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.