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Finding the Fourth Proportional to 247,056.40, 370,498.20 and 128,688.40

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Solution

The fourth proportional to 247,056.40, 370,498.20 and 128,688.40 is: 192,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,056.40 : 370,498.20 = 128,688.40 : x
  2. Step 2: Convert to fraction form
    247,056.40/370,498.20 = 128,688.40/x
  3. Step 3: Cross multiply
    247,056.40x = 370,498.20 × 128,688.40
  4. Step 4: Simplify right side
    247,056.40x = 47,678,820,560.88
  5. Step 5: Solve for x
    x = 47,678,820,560.88/247,056.40
  6. Step 6: Final answer
    x = 192,987.60

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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.