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Finding the Fourth Proportional to 343,685.40, 515,657.70 and 166,349.40

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Solution

The fourth proportional to 343,685.40, 515,657.70 and 166,349.40 is: 249,586.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,685.40 : 515,657.70 = 166,349.40 : x
  2. Step 2: Convert to fraction form
    343,685.40/515,657.70 = 166,349.40/x
  3. Step 3: Cross multiply
    343,685.40x = 515,657.70 × 166,349.40
  4. Step 4: Simplify right side
    343,685.40x = 85,779,349,000.38
  5. Step 5: Solve for x
    x = 85,779,349,000.38/343,685.40
  6. Step 6: Final answer
    x = 249,586.83

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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.