Home / 390,784.83-539,384.46-221,117.37

Finding the Fourth Proportional to 390,784.83, 539,384.46 and 221,117.37

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Solution

The fourth proportional to 390,784.83, 539,384.46 and 221,117.37 is: 305,199.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,784.83 : 539,384.46 = 221,117.37 : x
  2. Step 2: Convert to fraction form
    390,784.83/539,384.46 = 221,117.37/x
  3. Step 3: Cross multiply
    390,784.83x = 539,384.46 × 221,117.37
  4. Step 4: Simplify right side
    390,784.83x = 119,267,273,214.07
  5. Step 5: Solve for x
    x = 119,267,273,214.07/390,784.83
  6. Step 6: Final answer
    x = 305,199.34

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1.5x scale

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.