Home / 1,238,905,653.30-1,858,638,451.78-409,857,335.20

Finding the Fourth Proportional to 1,238,905,653.30, 1,858,638,451.78 and 409,857,335.20

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Solution

The fourth proportional to 1,238,905,653.30, 1,858,638,451.78 and 409,857,335.20 is: 614,878,623.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,905,653.30 : 1,858,638,451.78 = 409,857,335.20 : x
  2. Step 2: Convert to fraction form
    1,238,905,653.30/1,858,638,451.78 = 409,857,335.20/x
  3. Step 3: Cross multiply
    1,238,905,653.30x = 1,858,638,451.78 × 409,857,335.20
  4. Step 4: Simplify right side
    1,238,905,653.30x = 761,776,602,946,804,480
  5. Step 5: Solve for x
    x = 761,776,602,946,804,480/1,238,905,653.30
  6. Step 6: Final answer
    x = 614,878,623.66

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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.