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Finding the Fourth Proportional to 520,415.14, 717,909.78 and 348,340.36

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Solution

The fourth proportional to 520,415.14, 717,909.78 and 348,340.36 is: 480,533.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,415.14 : 717,909.78 = 348,340.36 : x
  2. Step 2: Convert to fraction form
    520,415.14/717,909.78 = 348,340.36/x
  3. Step 3: Cross multiply
    520,415.14x = 717,909.78 × 348,340.36
  4. Step 4: Simplify right side
    520,415.14x = 250,076,951,212.72
  5. Step 5: Solve for x
    x = 250,076,951,212.72/520,415.14
  6. Step 6: Final answer
    x = 480,533.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.