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Finding the Fourth Proportional to 315,795.70, 473,463.15 and 128,710.90

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Solution

The fourth proportional to 315,795.70, 473,463.15 and 128,710.90 is: 192,972.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,795.70 : 473,463.15 = 128,710.90 : x
  2. Step 2: Convert to fraction form
    315,795.70/473,463.15 = 128,710.90/x
  3. Step 3: Cross multiply
    315,795.70x = 473,463.15 × 128,710.90
  4. Step 4: Simplify right side
    315,795.70x = 60,939,868,153.34
  5. Step 5: Solve for x
    x = 60,939,868,153.34/315,795.70
  6. Step 6: Final answer
    x = 192,972.44

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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.