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Finding the Fourth Proportional to 472,991.80, 709,487.70 and 260,415.40

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Solution

The fourth proportional to 472,991.80, 709,487.70 and 260,415.40 is: 390,623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,991.80 : 709,487.70 = 260,415.40 : x
  2. Step 2: Convert to fraction form
    472,991.80/709,487.70 = 260,415.40/x
  3. Step 3: Cross multiply
    472,991.80x = 709,487.70 × 260,415.40
  4. Step 4: Simplify right side
    472,991.80x = 184,761,523,190.58
  5. Step 5: Solve for x
    x = 184,761,523,190.58/472,991.80
  6. Step 6: Final answer
    x = 390,623.10

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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.