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Finding the Fourth Proportional to 520,421.91, 780,058.95 and 340,432.62

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Solution

The fourth proportional to 520,421.91, 780,058.95 and 340,432.62 is: 510,273.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,421.91 : 780,058.95 = 340,432.62 : x
  2. Step 2: Convert to fraction form
    520,421.91/780,058.95 = 340,432.62/x
  3. Step 3: Cross multiply
    520,421.91x = 780,058.95 × 340,432.62
  4. Step 4: Simplify right side
    520,421.91x = 265,557,512,102.95
  5. Step 5: Solve for x
    x = 265,557,512,102.95/520,421.91
  6. Step 6: Final answer
    x = 510,273.51

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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.