Home / 1,387,678.87-1,915,316.90-903,400.75

Finding the Fourth Proportional to 1,387,678.87, 1,915,316.90 and 903,400.75

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Solution

The fourth proportional to 1,387,678.87, 1,915,316.90 and 903,400.75 is: 1,246,901.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,678.87 : 1,915,316.90 = 903,400.75 : x
  2. Step 2: Convert to fraction form
    1,387,678.87/1,915,316.90 = 903,400.75/x
  3. Step 3: Cross multiply
    1,387,678.87x = 1,915,316.90 × 903,400.75
  4. Step 4: Simplify right side
    1,387,678.87x = 1,730,298,719,430.67
  5. Step 5: Solve for x
    x = 1,730,298,719,430.67/1,387,678.87
  6. Step 6: Final answer
    x = 1,246,901.40

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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.