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Finding the Fourth Proportional to 478,345.60, 717,259.20 and 197,891.20

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Solution

The fourth proportional to 478,345.60, 717,259.20 and 197,891.20 is: 296,729.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,345.60 : 717,259.20 = 197,891.20 : x
  2. Step 2: Convert to fraction form
    478,345.60/717,259.20 = 197,891.20/x
  3. Step 3: Cross multiply
    478,345.60x = 717,259.20 × 197,891.20
  4. Step 4: Simplify right side
    478,345.60x = 141,939,283,799.04
  5. Step 5: Solve for x
    x = 141,939,283,799.04/478,345.60
  6. Step 6: Final answer
    x = 296,729.57

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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.