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Finding the Fourth Proportional to 261,398.78, 360,729.59 and 145,130.00

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Solution

The fourth proportional to 261,398.78, 360,729.59 and 145,130.00 is: 200,279.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,398.78 : 360,729.59 = 145,130.00 : x
  2. Step 2: Convert to fraction form
    261,398.78/360,729.59 = 145,130.00/x
  3. Step 3: Cross multiply
    261,398.78x = 360,729.59 × 145,130.00
  4. Step 4: Simplify right side
    261,398.78x = 52,352,686,523.33
  5. Step 5: Solve for x
    x = 52,352,686,523.33/261,398.78
  6. Step 6: Final answer
    x = 200,279.00

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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.