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Finding the Fourth Proportional to 555,381.45, 765,376.11 and 402,160.23

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Solution

The fourth proportional to 555,381.45, 765,376.11 and 402,160.23 is: 554,220.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,381.45 : 765,376.11 = 402,160.23 : x
  2. Step 2: Convert to fraction form
    555,381.45/765,376.11 = 402,160.23/x
  3. Step 3: Cross multiply
    555,381.45x = 765,376.11 × 402,160.23
  4. Step 4: Simplify right side
    555,381.45x = 307,803,832,434.11
  5. Step 5: Solve for x
    x = 307,803,832,434.11/555,381.45
  6. Step 6: Final answer
    x = 554,220.59

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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.