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Finding the Fourth Proportional to 310,347.89, 465,521.22 and 85,707.75

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Solution

The fourth proportional to 310,347.89, 465,521.22 and 85,707.75 is: 128,561.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,347.89 : 465,521.22 = 85,707.75 : x
  2. Step 2: Convert to fraction form
    310,347.89/465,521.22 = 85,707.75/x
  3. Step 3: Cross multiply
    310,347.89x = 465,521.22 × 85,707.75
  4. Step 4: Simplify right side
    310,347.89x = 39,898,776,343.46
  5. Step 5: Solve for x
    x = 39,898,776,343.46/310,347.89
  6. Step 6: Final answer
    x = 128,561.46

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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.