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Finding the Fourth Proportional to 508,909.40, 763,364.10 and 477,416.60

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Solution

The fourth proportional to 508,909.40, 763,364.10 and 477,416.60 is: 716,124.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,909.40 : 763,364.10 = 477,416.60 : x
  2. Step 2: Convert to fraction form
    508,909.40/763,364.10 = 477,416.60/x
  3. Step 3: Cross multiply
    508,909.40x = 763,364.10 × 477,416.60
  4. Step 4: Simplify right side
    508,909.40x = 364,442,693,184.06
  5. Step 5: Solve for x
    x = 364,442,693,184.06/508,909.40
  6. Step 6: Final answer
    x = 716,124.90

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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.