Home / 711,390,985.75-981,719,560.34-385,808,137.75

Finding the Fourth Proportional to 711,390,985.75, 981,719,560.34 and 385,808,137.75

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Solution

The fourth proportional to 711,390,985.75, 981,719,560.34 and 385,808,137.75 is: 532,415,230.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,390,985.75 : 981,719,560.34 = 385,808,137.75 : x
  2. Step 2: Convert to fraction form
    711,390,985.75/981,719,560.34 = 385,808,137.75/x
  3. Step 3: Cross multiply
    711,390,985.75x = 981,719,560.34 × 385,808,137.75
  4. Step 4: Simplify right side
    711,390,985.75x = 378,755,395,367,524,160
  5. Step 5: Solve for x
    x = 378,755,395,367,524,160/711,390,985.75
  6. Step 6: Final answer
    x = 532,415,230.10

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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.