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Finding the Fourth Proportional to 438,633.60, 657,440.10 and 202,000.20

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Solution

The fourth proportional to 438,633.60, 657,440.10 and 202,000.20 is: 302,765.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,633.60 : 657,440.10 = 202,000.20 : x
  2. Step 2: Convert to fraction form
    438,633.60/657,440.10 = 202,000.20/x
  3. Step 3: Cross multiply
    438,633.60x = 657,440.10 × 202,000.20
  4. Step 4: Simplify right side
    438,633.60x = 132,803,031,688.02
  5. Step 5: Solve for x
    x = 132,803,031,688.02/438,633.60
  6. Step 6: Final answer
    x = 302,765.30

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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.