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Finding the Fourth Proportional to 655,411.72, 904,555.20 and 368,988.16

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Solution

The fourth proportional to 655,411.72, 904,555.20 and 368,988.16 is: 509,252.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,411.72 : 904,555.20 = 368,988.16 : x
  2. Step 2: Convert to fraction form
    655,411.72/904,555.20 = 368,988.16/x
  3. Step 3: Cross multiply
    655,411.72x = 904,555.20 × 368,988.16
  4. Step 4: Simplify right side
    655,411.72x = 333,770,158,866.43
  5. Step 5: Solve for x
    x = 333,770,158,866.43/655,411.72
  6. Step 6: Final answer
    x = 509,252.66

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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.