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Finding the Fourth Proportional to 339,747.60, 509,621.40 and 318,752.40

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Solution

The fourth proportional to 339,747.60, 509,621.40 and 318,752.40 is: 478,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,747.60 : 509,621.40 = 318,752.40 : x
  2. Step 2: Convert to fraction form
    339,747.60/509,621.40 = 318,752.40/x
  3. Step 3: Cross multiply
    339,747.60x = 509,621.40 × 318,752.40
  4. Step 4: Simplify right side
    339,747.60x = 162,443,044,341.36
  5. Step 5: Solve for x
    x = 162,443,044,341.36/339,747.60
  6. Step 6: Final answer
    x = 478,128.60

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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.