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Finding the Fourth Proportional to 330,528, 457,329.60 and 288,174.72

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Solution

The fourth proportional to 330,528, 457,329.60 and 288,174.72 is: 398,728.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,528 : 457,329.60 = 288,174.72 : x
  2. Step 2: Convert to fraction form
    330,528/457,329.60 = 288,174.72/x
  3. Step 3: Cross multiply
    330,528x = 457,329.60 × 288,174.72
  4. Step 4: Simplify right side
    330,528x = 131,790,829,427.71
  5. Step 5: Solve for x
    x = 131,790,829,427.71/330,528
  6. Step 6: Final answer
    x = 398,728.18

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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.