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Finding the Fourth Proportional to 287,641,347.66, 396,944,888.50 and 155,482,345.95

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Solution

The fourth proportional to 287,641,347.66, 396,944,888.50 and 155,482,345.95 is: 214,565,544.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,641,347.66 : 396,944,888.50 = 155,482,345.95 : x
  2. Step 2: Convert to fraction form
    287,641,347.66/396,944,888.50 = 155,482,345.95/x
  3. Step 3: Cross multiply
    287,641,347.66x = 396,944,888.50 × 155,482,345.95
  4. Step 4: Simplify right side
    287,641,347.66x = 61,717,922,476,841,168
  5. Step 5: Solve for x
    x = 61,717,922,476,841,168/287,641,347.66
  6. Step 6: Final answer
    x = 214,565,544.83

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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.