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Finding the Fourth Proportional to 287,280,091.20, 403,212,494.40 and 287,280,091.20

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Solution

The fourth proportional to 287,280,091.20, 403,212,494.40 and 287,280,091.20 is: 403,212,494.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,280,091.20 : 403,212,494.40 = 287,280,091.20 : x
  2. Step 2: Convert to fraction form
    287,280,091.20/403,212,494.40 = 287,280,091.20/x
  3. Step 3: Cross multiply
    287,280,091.20x = 403,212,494.40 × 287,280,091.20
  4. Step 4: Simplify right side
    287,280,091.20x = 115,834,922,164,211,472
  5. Step 5: Solve for x
    x = 115,834,922,164,211,472/287,280,091.20
  6. Step 6: Final answer
    x = 403,212,494.40

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1.5x scale

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.