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Finding the Fourth Proportional to 258,869.52, 357,156.54 and 145,670.40

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Solution

The fourth proportional to 258,869.52, 357,156.54 and 145,670.40 is: 200,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,869.52 : 357,156.54 = 145,670.40 : x
  2. Step 2: Convert to fraction form
    258,869.52/357,156.54 = 145,670.40/x
  3. Step 3: Cross multiply
    258,869.52x = 357,156.54 × 145,670.40
  4. Step 4: Simplify right side
    258,869.52x = 52,027,136,044.42
  5. Step 5: Solve for x
    x = 52,027,136,044.42/258,869.52
  6. Step 6: Final answer
    x = 200,978.22

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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.