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Finding the Fourth Proportional to 658,447.40, 987,079.80 and 259,360.40

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Solution

The fourth proportional to 658,447.40, 987,079.80 and 259,360.40 is: 388,807.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,447.40 : 987,079.80 = 259,360.40 : x
  2. Step 2: Convert to fraction form
    658,447.40/987,079.80 = 259,360.40/x
  3. Step 3: Cross multiply
    658,447.40x = 987,079.80 × 259,360.40
  4. Step 4: Simplify right side
    658,447.40x = 256,009,411,759.92
  5. Step 5: Solve for x
    x = 256,009,411,759.92/658,447.40
  6. Step 6: Final answer
    x = 388,807.69

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1.5x scale

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.