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Finding the Fourth Proportional to 666,013.31, 919,206.90 and 495,066.45

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Solution

The fourth proportional to 666,013.31, 919,206.90 and 495,066.45 is: 683,272.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,013.31 : 919,206.90 = 495,066.45 : x
  2. Step 2: Convert to fraction form
    666,013.31/919,206.90 = 495,066.45/x
  3. Step 3: Cross multiply
    666,013.31x = 919,206.90 × 495,066.45
  4. Step 4: Simplify right side
    666,013.31x = 455,068,496,798.51
  5. Step 5: Solve for x
    x = 455,068,496,798.51/666,013.31
  6. Step 6: Final answer
    x = 683,272.38

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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.