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Finding the Fourth Proportional to 258,783.61, 357,143.25 and 145,628.23

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Solution

The fourth proportional to 258,783.61, 357,143.25 and 145,628.23 is: 200,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,783.61 : 357,143.25 = 145,628.23 : x
  2. Step 2: Convert to fraction form
    258,783.61/357,143.25 = 145,628.23/x
  3. Step 3: Cross multiply
    258,783.61x = 357,143.25 × 145,628.23
  4. Step 4: Simplify right side
    258,783.61x = 52,010,139,267.26
  5. Step 5: Solve for x
    x = 52,010,139,267.26/258,783.61
  6. Step 6: Final answer
    x = 200,979.26

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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.