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Finding the Fourth Proportional to 315,773.20, 473,429.40 and 128,688.40

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Solution

The fourth proportional to 315,773.20, 473,429.40 and 128,688.40 is: 192,938.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,773.20 : 473,429.40 = 128,688.40 : x
  2. Step 2: Convert to fraction form
    315,773.20/473,429.40 = 128,688.40/x
  3. Step 3: Cross multiply
    315,773.20x = 473,429.40 × 128,688.40
  4. Step 4: Simplify right side
    315,773.20x = 60,924,871,998.96
  5. Step 5: Solve for x
    x = 60,924,871,998.96/315,773.20
  6. Step 6: Final answer
    x = 192,938.70

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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.