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Finding the Fourth Proportional to 553,721.20, 830,581.80 and 474,005.05

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Solution

The fourth proportional to 553,721.20, 830,581.80 and 474,005.05 is: 711,007.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,721.20 : 830,581.80 = 474,005.05 : x
  2. Step 2: Convert to fraction form
    553,721.20/830,581.80 = 474,005.05/x
  3. Step 3: Cross multiply
    553,721.20x = 830,581.80 × 474,005.05
  4. Step 4: Simplify right side
    553,721.20x = 393,699,967,638.09
  5. Step 5: Solve for x
    x = 393,699,967,638.09/553,721.20
  6. Step 6: Final answer
    x = 711,007.58

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Similar ratio
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1.5x scale

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.