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Finding the Fourth Proportional to 438,000.40, 657,000.60 and 288,409.60

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Solution

The fourth proportional to 438,000.40, 657,000.60 and 288,409.60 is: 432,614.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,000.40 : 657,000.60 = 288,409.60 : x
  2. Step 2: Convert to fraction form
    438,000.40/657,000.60 = 288,409.60/x
  3. Step 3: Cross multiply
    438,000.40x = 657,000.60 × 288,409.60
  4. Step 4: Simplify right side
    438,000.40x = 189,485,280,245.76
  5. Step 5: Solve for x
    x = 189,485,280,245.76/438,000.40
  6. Step 6: Final answer
    x = 432,614.40

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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.