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Finding the Fourth Proportional to 520,784.40, 779,864.40 and 342,325.20

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Solution

The fourth proportional to 520,784.40, 779,864.40 and 342,325.20 is: 512,625.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,784.40 : 779,864.40 = 342,325.20 : x
  2. Step 2: Convert to fraction form
    520,784.40/779,864.40 = 342,325.20/x
  3. Step 3: Cross multiply
    520,784.40x = 779,864.40 × 342,325.20
  4. Step 4: Simplify right side
    520,784.40x = 266,967,236,702.88
  5. Step 5: Solve for x
    x = 266,967,236,702.88/520,784.40
  6. Step 6: Final answer
    x = 512,625.26

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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.