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Finding the Fourth Proportional to 315,528.40, 473,119.80 and 128,328.40

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Solution

The fourth proportional to 315,528.40, 473,119.80 and 128,328.40 is: 192,422.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,528.40 : 473,119.80 = 128,328.40 : x
  2. Step 2: Convert to fraction form
    315,528.40/473,119.80 = 128,328.40/x
  3. Step 3: Cross multiply
    315,528.40x = 473,119.80 × 128,328.40
  4. Step 4: Simplify right side
    315,528.40x = 60,714,706,942.32
  5. Step 5: Solve for x
    x = 60,714,706,942.32/315,528.40
  6. Step 6: Final answer
    x = 192,422.32

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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.