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Finding the Fourth Proportional to 478,779.35, 660,716.40 and 260,989.80

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Solution

The fourth proportional to 478,779.35, 660,716.40 and 260,989.80 is: 360,166.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,779.35 : 660,716.40 = 260,989.80 : x
  2. Step 2: Convert to fraction form
    478,779.35/660,716.40 = 260,989.80/x
  3. Step 3: Cross multiply
    478,779.35x = 660,716.40 × 260,989.80
  4. Step 4: Simplify right side
    478,779.35x = 172,440,238,125.68
  5. Step 5: Solve for x
    x = 172,440,238,125.68/478,779.35
  6. Step 6: Final answer
    x = 360,166.41

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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.