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Finding the Fourth Proportional to 660,908.16, 990,031.68 and 305,432.64

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Solution

The fourth proportional to 660,908.16, 990,031.68 and 305,432.64 is: 457,534.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,908.16 : 990,031.68 = 305,432.64 : x
  2. Step 2: Convert to fraction form
    660,908.16/990,031.68 = 305,432.64/x
  3. Step 3: Cross multiply
    660,908.16x = 990,031.68 × 305,432.64
  4. Step 4: Simplify right side
    660,908.16x = 302,387,989,706.04
  5. Step 5: Solve for x
    x = 302,387,989,706.04/660,908.16
  6. Step 6: Final answer
    x = 457,534.05

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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.