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Finding the Fourth Proportional to 486,328.56, 671,130.78 and 282,429.54

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Solution

The fourth proportional to 486,328.56, 671,130.78 and 282,429.54 is: 389,751.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,328.56 : 671,130.78 = 282,429.54 : x
  2. Step 2: Convert to fraction form
    486,328.56/671,130.78 = 282,429.54/x
  3. Step 3: Cross multiply
    486,328.56x = 671,130.78 × 282,429.54
  4. Step 4: Simplify right side
    486,328.56x = 189,547,157,475.24
  5. Step 5: Solve for x
    x = 189,547,157,475.24/486,328.56
  6. Step 6: Final answer
    x = 389,751.24

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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.