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Finding the Fourth Proportional to 660,026.32, 988,364.84 and 553,129.20

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Solution

The fourth proportional to 660,026.32, 988,364.84 and 553,129.20 is: 828,290.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,026.32 : 988,364.84 = 553,129.20 : x
  2. Step 2: Convert to fraction form
    660,026.32/988,364.84 = 553,129.20/x
  3. Step 3: Cross multiply
    660,026.32x = 988,364.84 × 553,129.20
  4. Step 4: Simplify right side
    660,026.32x = 546,693,453,257.33
  5. Step 5: Solve for x
    x = 546,693,453,257.33/660,026.32
  6. Step 6: Final answer
    x = 828,290.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.