Home / 393,210,905.92-542,835,042-287,245,335.04

Finding the Fourth Proportional to 393,210,905.92, 542,835,042 and 287,245,335.04

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Solution

The fourth proportional to 393,210,905.92, 542,835,042 and 287,245,335.04 is: 396,547,580.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,210,905.92 : 542,835,042 = 287,245,335.04 : x
  2. Step 2: Convert to fraction form
    393,210,905.92/542,835,042 = 287,245,335.04/x
  3. Step 3: Cross multiply
    393,210,905.92x = 542,835,042 × 287,245,335.04
  4. Step 4: Simplify right side
    393,210,905.92x = 155,926,833,510,742,496
  5. Step 5: Solve for x
    x = 155,926,833,510,742,496/393,210,905.92
  6. Step 6: Final answer
    x = 396,547,580.86

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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.