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Finding the Fourth Proportional to 261,040.60, 390,783.30 and 155,805.40

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Solution

The fourth proportional to 261,040.60, 390,783.30 and 155,805.40 is: 233,243.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,040.60 : 390,783.30 = 155,805.40 : x
  2. Step 2: Convert to fraction form
    261,040.60/390,783.30 = 155,805.40/x
  3. Step 3: Cross multiply
    261,040.60x = 390,783.30 × 155,805.40
  4. Step 4: Simplify right side
    261,040.60x = 60,886,148,369.82
  5. Step 5: Solve for x
    x = 60,886,148,369.82/261,040.60
  6. Step 6: Final answer
    x = 233,243.98

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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.