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Finding the Fourth Proportional to 1,215,580.80, 1,820,746.80 and 1,005,628.80

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Solution

The fourth proportional to 1,215,580.80, 1,820,746.80 and 1,005,628.80 is: 1,506,272.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,580.80 : 1,820,746.80 = 1,005,628.80 : x
  2. Step 2: Convert to fraction form
    1,215,580.80/1,820,746.80 = 1,005,628.80/x
  3. Step 3: Cross multiply
    1,215,580.80x = 1,820,746.80 × 1,005,628.80
  4. Step 4: Simplify right side
    1,215,580.80x = 1,830,995,419,587.84
  5. Step 5: Solve for x
    x = 1,830,995,419,587.84/1,215,580.80
  6. Step 6: Final answer
    x = 1,506,272.08

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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.