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Finding the Fourth Proportional to 710,444.39, 980,401.79 and 388,147.55

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Solution

The fourth proportional to 710,444.39, 980,401.79 and 388,147.55 is: 535,637.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,444.39 : 980,401.79 = 388,147.55 : x
  2. Step 2: Convert to fraction form
    710,444.39/980,401.79 = 388,147.55/x
  3. Step 3: Cross multiply
    710,444.39x = 980,401.79 × 388,147.55
  4. Step 4: Simplify right side
    710,444.39x = 380,540,548,872.47
  5. Step 5: Solve for x
    x = 380,540,548,872.47/710,444.39
  6. Step 6: Final answer
    x = 535,637.35

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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.