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Finding the Fourth Proportional to 287,780,217.90, 403,799,297.70 and 287,780,217.90

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Solution

The fourth proportional to 287,780,217.90, 403,799,297.70 and 287,780,217.90 is: 403,799,297.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,780,217.90 : 403,799,297.70 = 287,780,217.90 : x
  2. Step 2: Convert to fraction form
    287,780,217.90/403,799,297.70 = 287,780,217.90/x
  3. Step 3: Cross multiply
    287,780,217.90x = 403,799,297.70 × 287,780,217.90
  4. Step 4: Simplify right side
    287,780,217.90x = 116,205,449,879,972,960
  5. Step 5: Solve for x
    x = 116,205,449,879,972,960/287,780,217.90
  6. Step 6: Final answer
    x = 403,799,297.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.