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Finding the Fourth Proportional to 631,855.80, 947,783.70 and 392,707.35

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Solution

The fourth proportional to 631,855.80, 947,783.70 and 392,707.35 is: 589,061.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,855.80 : 947,783.70 = 392,707.35 : x
  2. Step 2: Convert to fraction form
    631,855.80/947,783.70 = 392,707.35/x
  3. Step 3: Cross multiply
    631,855.80x = 947,783.70 × 392,707.35
  4. Step 4: Simplify right side
    631,855.80x = 372,201,625,200.20
  5. Step 5: Solve for x
    x = 372,201,625,200.20/631,855.80
  6. Step 6: Final answer
    x = 589,061.03

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Double scale
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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.