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Finding the Fourth Proportional to 525,612.40, 787,381.80 and 314,623.60

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Solution

The fourth proportional to 525,612.40, 787,381.80 and 314,623.60 is: 471,314.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,612.40 : 787,381.80 = 314,623.60 : x
  2. Step 2: Convert to fraction form
    525,612.40/787,381.80 = 314,623.60/x
  3. Step 3: Cross multiply
    525,612.40x = 787,381.80 × 314,623.60
  4. Step 4: Simplify right side
    525,612.40x = 247,728,896,490.48
  5. Step 5: Solve for x
    x = 247,728,896,490.48/525,612.40
  6. Step 6: Final answer
    x = 471,314.79

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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.