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Finding the Fourth Proportional to 486,335.72, 671,140.71 and 282,436.76

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Solution

The fourth proportional to 486,335.72, 671,140.71 and 282,436.76 is: 389,761.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,335.72 : 671,140.71 = 282,436.76 : x
  2. Step 2: Convert to fraction form
    486,335.72/671,140.71 = 282,436.76/x
  3. Step 3: Cross multiply
    486,335.72x = 671,140.71 × 282,436.76
  4. Step 4: Simplify right side
    486,335.72x = 189,554,804,280.80
  5. Step 5: Solve for x
    x = 189,554,804,280.80/486,335.72
  6. Step 6: Final answer
    x = 389,761.23

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Double scale
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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.