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Finding the Fourth Proportional to 310,259.52, 428,157.90 and 176,123.52

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Solution

The fourth proportional to 310,259.52, 428,157.90 and 176,123.52 is: 243,050.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,259.52 : 428,157.90 = 176,123.52 : x
  2. Step 2: Convert to fraction form
    310,259.52/428,157.90 = 176,123.52/x
  3. Step 3: Cross multiply
    310,259.52x = 428,157.90 × 176,123.52
  4. Step 4: Simplify right side
    310,259.52x = 75,408,676,463.81
  5. Step 5: Solve for x
    x = 75,408,676,463.81/310,259.52
  6. Step 6: Final answer
    x = 243,050.32

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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.