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Finding the Fourth Proportional to 520,134.40, 778,889.40 and 415,158.40

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Solution

The fourth proportional to 520,134.40, 778,889.40 and 415,158.40 is: 621,690.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,134.40 : 778,889.40 = 415,158.40 : x
  2. Step 2: Convert to fraction form
    520,134.40/778,889.40 = 415,158.40/x
  3. Step 3: Cross multiply
    520,134.40x = 778,889.40 × 415,158.40
  4. Step 4: Simplify right side
    520,134.40x = 323,362,477,080.96
  5. Step 5: Solve for x
    x = 323,362,477,080.96/520,134.40
  6. Step 6: Final answer
    x = 621,690.23

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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.