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Finding the Fourth Proportional to 657,728.72, 986,597.40 and 208,440.08

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Solution

The fourth proportional to 657,728.72, 986,597.40 and 208,440.08 is: 312,661.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,728.72 : 986,597.40 = 208,440.08 : x
  2. Step 2: Convert to fraction form
    657,728.72/986,597.40 = 208,440.08/x
  3. Step 3: Cross multiply
    657,728.72x = 986,597.40 × 208,440.08
  4. Step 4: Simplify right side
    657,728.72x = 205,646,440,983.79
  5. Step 5: Solve for x
    x = 205,646,440,983.79/657,728.72
  6. Step 6: Final answer
    x = 312,661.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.