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Finding the Fourth Proportional to 478,307.66, 660,039.62 and 297,015.68

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Solution

The fourth proportional to 478,307.66, 660,039.62 and 297,015.68 is: 409,866.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,307.66 : 660,039.62 = 297,015.68 : x
  2. Step 2: Convert to fraction form
    478,307.66/660,039.62 = 297,015.68/x
  3. Step 3: Cross multiply
    478,307.66x = 660,039.62 × 297,015.68
  4. Step 4: Simplify right side
    478,307.66x = 196,042,118,953.88
  5. Step 5: Solve for x
    x = 196,042,118,953.88/478,307.66
  6. Step 6: Final answer
    x = 409,866.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.