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Finding the Fourth Proportional to 642,290.16, 964,319.76 and 326,966.88

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Solution

The fourth proportional to 642,290.16, 964,319.76 and 326,966.88 is: 490,900.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,290.16 : 964,319.76 = 326,966.88 : x
  2. Step 2: Convert to fraction form
    642,290.16/964,319.76 = 326,966.88/x
  3. Step 3: Cross multiply
    642,290.16x = 964,319.76 × 326,966.88
  4. Step 4: Simplify right side
    642,290.16x = 315,300,623,249.55
  5. Step 5: Solve for x
    x = 315,300,623,249.55/642,290.16
  6. Step 6: Final answer
    x = 490,900.60

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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.