Home / 840,728.04-1,160,239.56-478,215.72

Finding the Fourth Proportional to 840,728.04, 1,160,239.56 and 478,215.72

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Solution

The fourth proportional to 840,728.04, 1,160,239.56 and 478,215.72 is: 659,957.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,728.04 : 1,160,239.56 = 478,215.72 : x
  2. Step 2: Convert to fraction form
    840,728.04/1,160,239.56 = 478,215.72/x
  3. Step 3: Cross multiply
    840,728.04x = 1,160,239.56 × 478,215.72
  4. Step 4: Simplify right side
    840,728.04x = 554,844,796,557.88
  5. Step 5: Solve for x
    x = 554,844,796,557.88/840,728.04
  6. Step 6: Final answer
    x = 659,957.53

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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.