Home / 258,984,659.60-388,476,989.40-257,473,005.20

Finding the Fourth Proportional to 258,984,659.60, 388,476,989.40 and 257,473,005.20

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Solution

The fourth proportional to 258,984,659.60, 388,476,989.40 and 257,473,005.20 is: 386,209,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,984,659.60 : 388,476,989.40 = 257,473,005.20 : x
  2. Step 2: Convert to fraction form
    258,984,659.60/388,476,989.40 = 257,473,005.20/x
  3. Step 3: Cross multiply
    258,984,659.60x = 388,476,989.40 × 257,473,005.20
  4. Step 4: Simplify right side
    258,984,659.60x = 100,022,337,911,866,528
  5. Step 5: Solve for x
    x = 100,022,337,911,866,528/258,984,659.60
  6. Step 6: Final answer
    x = 386,209,507.80

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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.