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Finding the Fourth Proportional to 714,940.80, 1,071,864.45 and 360,209.40

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Solution

The fourth proportional to 714,940.80, 1,071,864.45 and 360,209.40 is: 540,038.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,940.80 : 1,071,864.45 = 360,209.40 : x
  2. Step 2: Convert to fraction form
    714,940.80/1,071,864.45 = 360,209.40/x
  3. Step 3: Cross multiply
    714,940.80x = 1,071,864.45 × 360,209.40
  4. Step 4: Simplify right side
    714,940.80x = 386,095,650,415.83
  5. Step 5: Solve for x
    x = 386,095,650,415.83/714,940.80
  6. Step 6: Final answer
    x = 540,038.63

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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.