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Finding the Fourth Proportional to 922,615.64, 1,383,981.82 and 390,037.40

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Solution

The fourth proportional to 922,615.64, 1,383,981.82 and 390,037.40 is: 585,080.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,615.64 : 1,383,981.82 = 390,037.40 : x
  2. Step 2: Convert to fraction form
    922,615.64/1,383,981.82 = 390,037.40/x
  3. Step 3: Cross multiply
    922,615.64x = 1,383,981.82 × 390,037.40
  4. Step 4: Simplify right side
    922,615.64x = 539,804,670,720.07
  5. Step 5: Solve for x
    x = 539,804,670,720.07/922,615.64
  6. Step 6: Final answer
    x = 585,080.77

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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.