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Finding the Fourth Proportional to 478,881.40, 660,852.84 and 261,089.32

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Solution

The fourth proportional to 478,881.40, 660,852.84 and 261,089.32 is: 360,301.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,881.40 : 660,852.84 = 261,089.32 : x
  2. Step 2: Convert to fraction form
    478,881.40/660,852.84 = 261,089.32/x
  3. Step 3: Cross multiply
    478,881.40x = 660,852.84 × 261,089.32
  4. Step 4: Simplify right side
    478,881.40x = 172,541,618,615.67
  5. Step 5: Solve for x
    x = 172,541,618,615.67/478,881.40
  6. Step 6: Final answer
    x = 360,301.36

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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.