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Finding the Fourth Proportional to 922,995.47, 1,384,639.61 and 390,520.50

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Solution

The fourth proportional to 922,995.47, 1,384,639.61 and 390,520.50 is: 585,842.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,995.47 : 1,384,639.61 = 390,520.50 : x
  2. Step 2: Convert to fraction form
    922,995.47/1,384,639.61 = 390,520.50/x
  3. Step 3: Cross multiply
    922,995.47x = 1,384,639.61 × 390,520.50
  4. Step 4: Simplify right side
    922,995.47x = 540,730,150,864.40
  5. Step 5: Solve for x
    x = 540,730,150,864.40/922,995.47
  6. Step 6: Final answer
    x = 585,842.70

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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.