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Finding the Fourth Proportional to 478,439.84, 660,223.32 and 263,574.20

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Solution

The fourth proportional to 478,439.84, 660,223.32 and 263,574.20 is: 363,719.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,439.84 : 660,223.32 = 263,574.20 : x
  2. Step 2: Convert to fraction form
    478,439.84/660,223.32 = 263,574.20/x
  3. Step 3: Cross multiply
    478,439.84x = 660,223.32 × 263,574.20
  4. Step 4: Simplify right side
    478,439.84x = 174,017,833,390.34
  5. Step 5: Solve for x
    x = 174,017,833,390.34/478,439.84
  6. Step 6: Final answer
    x = 363,719.36

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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.