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Finding the Fourth Proportional to 488,378.40, 732,130.20 and 319,979.40

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Solution

The fourth proportional to 488,378.40, 732,130.20 and 319,979.40 is: 479,682.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,378.40 : 732,130.20 = 319,979.40 : x
  2. Step 2: Convert to fraction form
    488,378.40/732,130.20 = 319,979.40/x
  3. Step 3: Cross multiply
    488,378.40x = 732,130.20 × 319,979.40
  4. Step 4: Simplify right side
    488,378.40x = 234,266,582,117.88
  5. Step 5: Solve for x
    x = 234,266,582,117.88/488,378.40
  6. Step 6: Final answer
    x = 479,682.52

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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.