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Finding the Fourth Proportional to 490,526.78, 676,505.42 and 318,275.01

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Solution

The fourth proportional to 490,526.78, 676,505.42 and 318,275.01 is: 438,946.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,526.78 : 676,505.42 = 318,275.01 : x
  2. Step 2: Convert to fraction form
    490,526.78/676,505.42 = 318,275.01/x
  3. Step 3: Cross multiply
    490,526.78x = 676,505.42 × 318,275.01
  4. Step 4: Simplify right side
    490,526.78x = 215,314,767,724.18
  5. Step 5: Solve for x
    x = 215,314,767,724.18/490,526.78
  6. Step 6: Final answer
    x = 438,946.00

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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.