Home / 258,686,213.60-388,029,320.40-243,380,712.80

Finding the Fourth Proportional to 258,686,213.60, 388,029,320.40 and 243,380,712.80

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Solution

The fourth proportional to 258,686,213.60, 388,029,320.40 and 243,380,712.80 is: 365,071,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,686,213.60 : 388,029,320.40 = 243,380,712.80 : x
  2. Step 2: Convert to fraction form
    258,686,213.60/388,029,320.40 = 243,380,712.80/x
  3. Step 3: Cross multiply
    258,686,213.60x = 388,029,320.40 × 243,380,712.80
  4. Step 4: Simplify right side
    258,686,213.60x = 94,438,852,586,251,584
  5. Step 5: Solve for x
    x = 94,438,852,586,251,584/258,686,213.60
  6. Step 6: Final answer
    x = 365,071,069.20

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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.