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Finding the Fourth Proportional to 459,086.80, 688,630.20 and 385,603.60

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Solution

The fourth proportional to 459,086.80, 688,630.20 and 385,603.60 is: 578,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,086.80 : 688,630.20 = 385,603.60 : x
  2. Step 2: Convert to fraction form
    459,086.80/688,630.20 = 385,603.60/x
  3. Step 3: Cross multiply
    459,086.80x = 688,630.20 × 385,603.60
  4. Step 4: Simplify right side
    459,086.80x = 265,538,284,188.72
  5. Step 5: Solve for x
    x = 265,538,284,188.72/459,086.80
  6. Step 6: Final answer
    x = 578,405.40

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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.