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Finding the Fourth Proportional to 472,421.40, 708,632.10 and 320,862.30

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Solution

The fourth proportional to 472,421.40, 708,632.10 and 320,862.30 is: 481,293.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,421.40 : 708,632.10 = 320,862.30 : x
  2. Step 2: Convert to fraction form
    472,421.40/708,632.10 = 320,862.30/x
  3. Step 3: Cross multiply
    472,421.40x = 708,632.10 × 320,862.30
  4. Step 4: Simplify right side
    472,421.40x = 227,373,325,459.83
  5. Step 5: Solve for x
    x = 227,373,325,459.83/472,421.40
  6. Step 6: Final answer
    x = 481,293.45

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Double scale
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Similar ratio
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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.