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Finding the Fourth Proportional to 356,870.81, 492,436.33 and 203,918.91

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Solution

The fourth proportional to 356,870.81, 492,436.33 and 203,918.91 is: 281,382.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,870.81 : 492,436.33 = 203,918.91 : x
  2. Step 2: Convert to fraction form
    356,870.81/492,436.33 = 203,918.91/x
  3. Step 3: Cross multiply
    356,870.81x = 492,436.33 × 203,918.91
  4. Step 4: Simplify right side
    356,870.81x = 100,417,078,638.41
  5. Step 5: Solve for x
    x = 100,417,078,638.41/356,870.81
  6. Step 6: Final answer
    x = 281,382.16

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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.