Home / 390,725.16-539,223.32-218,641.62

Finding the Fourth Proportional to 390,725.16, 539,223.32 and 218,641.62

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Solution

The fourth proportional to 390,725.16, 539,223.32 and 218,641.62 is: 301,738.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,725.16 : 539,223.32 = 218,641.62 : x
  2. Step 2: Convert to fraction form
    390,725.16/539,223.32 = 218,641.62/x
  3. Step 3: Cross multiply
    390,725.16x = 539,223.32 × 218,641.62
  4. Step 4: Simplify right side
    390,725.16x = 117,896,660,356.31
  5. Step 5: Solve for x
    x = 117,896,660,356.31/390,725.16
  6. Step 6: Final answer
    x = 301,738.08

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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.