Home / 688,127,631.20-949,615,712.40-379,078,287.20

Finding the Fourth Proportional to 688,127,631.20, 949,615,712.40 and 379,078,287.20

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Solution

The fourth proportional to 688,127,631.20, 949,615,712.40 and 379,078,287.20 is: 523,127,805.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,127,631.20 : 949,615,712.40 = 379,078,287.20 : x
  2. Step 2: Convert to fraction form
    688,127,631.20/949,615,712.40 = 379,078,287.20/x
  3. Step 3: Cross multiply
    688,127,631.20x = 949,615,712.40 × 379,078,287.20
  4. Step 4: Simplify right side
    688,127,631.20x = 359,978,697,754,799,808
  5. Step 5: Solve for x
    x = 359,978,697,754,799,808/688,127,631.20
  6. Step 6: Final answer
    x = 523,127,805.71

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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.