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Finding the Fourth Proportional to 387,962.88, 535,410.72 and 258,678.24

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Solution

The fourth proportional to 387,962.88, 535,410.72 and 258,678.24 is: 356,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,962.88 : 535,410.72 = 258,678.24 : x
  2. Step 2: Convert to fraction form
    387,962.88/535,410.72 = 258,678.24/x
  3. Step 3: Cross multiply
    387,962.88x = 535,410.72 × 258,678.24
  4. Step 4: Simplify right side
    387,962.88x = 138,499,102,726.73
  5. Step 5: Solve for x
    x = 138,499,102,726.73/387,962.88
  6. Step 6: Final answer
    x = 356,990.60

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1.5x scale

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.