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Finding the Fourth Proportional to 478,689.76, 660,583.20 and 260,900.32

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Solution

The fourth proportional to 478,689.76, 660,583.20 and 260,900.32 is: 360,037.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,689.76 : 660,583.20 = 260,900.32 : x
  2. Step 2: Convert to fraction form
    478,689.76/660,583.20 = 260,900.32/x
  3. Step 3: Cross multiply
    478,689.76x = 660,583.20 × 260,900.32
  4. Step 4: Simplify right side
    478,689.76x = 172,346,368,266.62
  5. Step 5: Solve for x
    x = 172,346,368,266.62/478,689.76
  6. Step 6: Final answer
    x = 360,037.72

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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.