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Finding the Fourth Proportional to 1,216,238.40, 1,678,860 and 732,830.40

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Solution

The fourth proportional to 1,216,238.40, 1,678,860 and 732,830.40 is: 1,011,577.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,238.40 : 1,678,860 = 732,830.40 : x
  2. Step 2: Convert to fraction form
    1,216,238.40/1,678,860 = 732,830.40/x
  3. Step 3: Cross multiply
    1,216,238.40x = 1,678,860 × 732,830.40
  4. Step 4: Simplify right side
    1,216,238.40x = 1,230,319,645,344
  5. Step 5: Solve for x
    x = 1,230,319,645,344/1,216,238.40
  6. Step 6: Final answer
    x = 1,011,577.70

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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.