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Finding the Fourth Proportional to 378,117.60, 567,176.40 and 343,125.60

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Solution

The fourth proportional to 378,117.60, 567,176.40 and 343,125.60 is: 514,688.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,117.60 : 567,176.40 = 343,125.60 : x
  2. Step 2: Convert to fraction form
    378,117.60/567,176.40 = 343,125.60/x
  3. Step 3: Cross multiply
    378,117.60x = 567,176.40 × 343,125.60
  4. Step 4: Simplify right side
    378,117.60x = 194,612,742,555.84
  5. Step 5: Solve for x
    x = 194,612,742,555.84/378,117.60
  6. Step 6: Final answer
    x = 514,688.40

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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.