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Finding the Fourth Proportional to 661,494,896.64, 912,854,046.72 and 368,139,386.88

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Solution

The fourth proportional to 661,494,896.64, 912,854,046.72 and 368,139,386.88 is: 508,027,394.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,494,896.64 : 912,854,046.72 = 368,139,386.88 : x
  2. Step 2: Convert to fraction form
    661,494,896.64/912,854,046.72 = 368,139,386.88/x
  3. Step 3: Cross multiply
    661,494,896.64x = 912,854,046.72 × 368,139,386.88
  4. Step 4: Simplify right side
    661,494,896.64x = 336,057,529,070,427,712
  5. Step 5: Solve for x
    x = 336,057,529,070,427,712/661,494,896.64
  6. Step 6: Final answer
    x = 508,027,394.89

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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.