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Finding the Fourth Proportional to 310,362.76, 465,459.18 and 85,669.48

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Solution

The fourth proportional to 310,362.76, 465,459.18 and 85,669.48 is: 128,480.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,362.76 : 465,459.18 = 85,669.48 : x
  2. Step 2: Convert to fraction form
    310,362.76/465,459.18 = 85,669.48/x
  3. Step 3: Cross multiply
    310,362.76x = 465,459.18 × 85,669.48
  4. Step 4: Simplify right side
    310,362.76x = 39,875,645,911.83
  5. Step 5: Solve for x
    x = 39,875,645,911.83/310,362.76
  6. Step 6: Final answer
    x = 128,480.77

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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.