Home / 387,930,979.60-581,896,469.40-345,840,852.40

Finding the Fourth Proportional to 387,930,979.60, 581,896,469.40 and 345,840,852.40

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Solution

The fourth proportional to 387,930,979.60, 581,896,469.40 and 345,840,852.40 is: 518,761,278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,930,979.60 : 581,896,469.40 = 345,840,852.40 : x
  2. Step 2: Convert to fraction form
    387,930,979.60/581,896,469.40 = 345,840,852.40/x
  3. Step 3: Cross multiply
    387,930,979.60x = 581,896,469.40 × 345,840,852.40
  4. Step 4: Simplify right side
    387,930,979.60x = 201,243,570,985,846,496
  5. Step 5: Solve for x
    x = 201,243,570,985,846,496/387,930,979.60
  6. Step 6: Final answer
    x = 518,761,278.60

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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.