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Finding the Fourth Proportional to 328,424.31, 453,053.45 and 285,307.01

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Solution

The fourth proportional to 328,424.31, 453,053.45 and 285,307.01 is: 393,574.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,424.31 : 453,053.45 = 285,307.01 : x
  2. Step 2: Convert to fraction form
    328,424.31/453,053.45 = 285,307.01/x
  3. Step 3: Cross multiply
    328,424.31x = 453,053.45 × 285,307.01
  4. Step 4: Simplify right side
    328,424.31x = 129,259,324,619.89
  5. Step 5: Solve for x
    x = 129,259,324,619.89/328,424.31
  6. Step 6: Final answer
    x = 393,574.17

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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.