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Finding the Fourth Proportional to 315,346.40, 473,077.20 and 128,376.80

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Solution

The fourth proportional to 315,346.40, 473,077.20 and 128,376.80 is: 192,588.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,346.40 : 473,077.20 = 128,376.80 : x
  2. Step 2: Convert to fraction form
    315,346.40/473,077.20 = 128,376.80/x
  3. Step 3: Cross multiply
    315,346.40x = 473,077.20 × 128,376.80
  4. Step 4: Simplify right side
    315,346.40x = 60,732,137,088.96
  5. Step 5: Solve for x
    x = 60,732,137,088.96/315,346.40
  6. Step 6: Final answer
    x = 192,588.65

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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.