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Finding the Fourth Proportional to 478,509.76, 660,344.16 and 260,717.44

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Solution

The fourth proportional to 478,509.76, 660,344.16 and 260,717.44 is: 359,790.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,509.76 : 660,344.16 = 260,717.44 : x
  2. Step 2: Convert to fraction form
    478,509.76/660,344.16 = 260,717.44/x
  3. Step 3: Cross multiply
    478,509.76x = 660,344.16 × 260,717.44
  4. Step 4: Simplify right side
    478,509.76x = 172,163,238,914.15
  5. Step 5: Solve for x
    x = 172,163,238,914.15/478,509.76
  6. Step 6: Final answer
    x = 359,790.44

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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.