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Finding the Fourth Proportional to 578,712.80, 867,939.60 and 380,424.80

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Solution

The fourth proportional to 578,712.80, 867,939.60 and 380,424.80 is: 570,552.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,712.80 : 867,939.60 = 380,424.80 : x
  2. Step 2: Convert to fraction form
    578,712.80/867,939.60 = 380,424.80/x
  3. Step 3: Cross multiply
    578,712.80x = 867,939.60 × 380,424.80
  4. Step 4: Simplify right side
    578,712.80x = 330,185,748,742.08
  5. Step 5: Solve for x
    x = 330,185,748,742.08/578,712.80
  6. Step 6: Final answer
    x = 570,552.01

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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.