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Finding the Fourth Proportional to 315,738.90, 473,435.55 and 128,538.90

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Solution

The fourth proportional to 315,738.90, 473,435.55 and 128,538.90 is: 192,738.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,738.90 : 473,435.55 = 128,538.90 : x
  2. Step 2: Convert to fraction form
    315,738.90/473,435.55 = 128,538.90/x
  3. Step 3: Cross multiply
    315,738.90x = 473,435.55 × 128,538.90
  4. Step 4: Simplify right side
    315,738.90x = 60,854,884,817.90
  5. Step 5: Solve for x
    x = 60,854,884,817.90/315,738.90
  6. Step 6: Final answer
    x = 192,738.00

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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.