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Finding the Fourth Proportional to 885,686.40, 1,328,702.40 and 380,246.40

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Solution

The fourth proportional to 885,686.40, 1,328,702.40 and 380,246.40 is: 570,443.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,686.40 : 1,328,702.40 = 380,246.40 : x
  2. Step 2: Convert to fraction form
    885,686.40/1,328,702.40 = 380,246.40/x
  3. Step 3: Cross multiply
    885,686.40x = 1,328,702.40 × 380,246.40
  4. Step 4: Simplify right side
    885,686.40x = 505,234,304,271.36
  5. Step 5: Solve for x
    x = 505,234,304,271.36/885,686.40
  6. Step 6: Final answer
    x = 570,443.79

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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.