Home / 817,455.25-1,225,387.34-390,880.90

Finding the Fourth Proportional to 817,455.25, 1,225,387.34 and 390,880.90

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Solution

The fourth proportional to 817,455.25, 1,225,387.34 and 390,880.90 is: 585,940.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,455.25 : 1,225,387.34 = 390,880.90 : x
  2. Step 2: Convert to fraction form
    817,455.25/1,225,387.34 = 390,880.90/x
  3. Step 3: Cross multiply
    817,455.25x = 1,225,387.34 × 390,880.90
  4. Step 4: Simplify right side
    817,455.25x = 478,980,501,289.93
  5. Step 5: Solve for x
    x = 478,980,501,289.93/817,455.25
  6. Step 6: Final answer
    x = 585,940.95

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1.5x scale

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.