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Finding the Fourth Proportional to 922,995.51, 1,384,639.65 and 390,520.50

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Solution

The fourth proportional to 922,995.51, 1,384,639.65 and 390,520.50 is: 585,842.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,995.51 : 1,384,639.65 = 390,520.50 : x
  2. Step 2: Convert to fraction form
    922,995.51/1,384,639.65 = 390,520.50/x
  3. Step 3: Cross multiply
    922,995.51x = 1,384,639.65 × 390,520.50
  4. Step 4: Simplify right side
    922,995.51x = 540,730,168,437.83
  5. Step 5: Solve for x
    x = 540,730,168,437.83/922,995.51
  6. Step 6: Final answer
    x = 585,842.69

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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.