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Finding the Fourth Proportional to 486,886.40, 730,329.60 and 287,302.40

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Solution

The fourth proportional to 486,886.40, 730,329.60 and 287,302.40 is: 430,953.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,886.40 : 730,329.60 = 287,302.40 : x
  2. Step 2: Convert to fraction form
    486,886.40/730,329.60 = 287,302.40/x
  3. Step 3: Cross multiply
    486,886.40x = 730,329.60 × 287,302.40
  4. Step 4: Simplify right side
    486,886.40x = 209,825,446,871.04
  5. Step 5: Solve for x
    x = 209,825,446,871.04/486,886.40
  6. Step 6: Final answer
    x = 430,953.60

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Similar ratio
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1.5x scale

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.