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Finding the Fourth Proportional to 613,272,443.70, 919,908,665.55 and 368,384,430.90

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Solution

The fourth proportional to 613,272,443.70, 919,908,665.55 and 368,384,430.90 is: 552,576,646.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,272,443.70 : 919,908,665.55 = 368,384,430.90 : x
  2. Step 2: Convert to fraction form
    613,272,443.70/919,908,665.55 = 368,384,430.90/x
  3. Step 3: Cross multiply
    613,272,443.70x = 919,908,665.55 × 368,384,430.90
  4. Step 4: Simplify right side
    613,272,443.70x = 338,880,030,238,615,168
  5. Step 5: Solve for x
    x = 338,880,030,238,615,168/613,272,443.70
  6. Step 6: Final answer
    x = 552,576,646.35

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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.