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Finding the Fourth Proportional to 922,272.40, 1,383,667.80 and 390,048.40

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Solution

The fourth proportional to 922,272.40, 1,383,667.80 and 390,048.40 is: 585,182.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,272.40 : 1,383,667.80 = 390,048.40 : x
  2. Step 2: Convert to fraction form
    922,272.40/1,383,667.80 = 390,048.40/x
  3. Step 3: Cross multiply
    922,272.40x = 1,383,667.80 × 390,048.40
  4. Step 4: Simplify right side
    922,272.40x = 539,697,411,521.52
  5. Step 5: Solve for x
    x = 539,697,411,521.52/922,272.40
  6. Step 6: Final answer
    x = 585,182.22

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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.