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Finding the Fourth Proportional to 518,738.40, 776,853.60 and 429,333.84

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Solution

The fourth proportional to 518,738.40, 776,853.60 and 429,333.84 is: 642,962.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,738.40 : 776,853.60 = 429,333.84 : x
  2. Step 2: Convert to fraction form
    518,738.40/776,853.60 = 429,333.84/x
  3. Step 3: Cross multiply
    518,738.40x = 776,853.60 × 429,333.84
  4. Step 4: Simplify right side
    518,738.40x = 333,529,539,205.82
  5. Step 5: Solve for x
    x = 333,529,539,205.82/518,738.40
  6. Step 6: Final answer
    x = 642,962.89

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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.