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Finding the Fourth Proportional to 660,196.48, 911,220.96 and 418,812.16

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Solution

The fourth proportional to 660,196.48, 911,220.96 and 418,812.16 is: 578,055.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,196.48 : 911,220.96 = 418,812.16 : x
  2. Step 2: Convert to fraction form
    660,196.48/911,220.96 = 418,812.16/x
  3. Step 3: Cross multiply
    660,196.48x = 911,220.96 × 418,812.16
  4. Step 4: Simplify right side
    660,196.48x = 381,630,418,494.87
  5. Step 5: Solve for x
    x = 381,630,418,494.87/660,196.48
  6. Step 6: Final answer
    x = 578,055.82

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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.