Home / 391,203,721.20-586,805,581.80-385,464,158.40

Finding the Fourth Proportional to 391,203,721.20, 586,805,581.80 and 385,464,158.40

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Solution

The fourth proportional to 391,203,721.20, 586,805,581.80 and 385,464,158.40 is: 578,196,237.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,203,721.20 : 586,805,581.80 = 385,464,158.40 : x
  2. Step 2: Convert to fraction form
    391,203,721.20/586,805,581.80 = 385,464,158.40/x
  3. Step 3: Cross multiply
    391,203,721.20x = 586,805,581.80 × 385,464,158.40
  4. Step 4: Simplify right side
    391,203,721.20x = 226,192,519,732,959,328
  5. Step 5: Solve for x
    x = 226,192,519,732,959,328/391,203,721.20
  6. Step 6: Final answer
    x = 578,196,237.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.