Home / 387,904.20-535,301.34-215,820.36

Finding the Fourth Proportional to 387,904.20, 535,301.34 and 215,820.36

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Solution

The fourth proportional to 387,904.20, 535,301.34 and 215,820.36 is: 297,828.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,904.20 : 535,301.34 = 215,820.36 : x
  2. Step 2: Convert to fraction form
    387,904.20/535,301.34 = 215,820.36/x
  3. Step 3: Cross multiply
    387,904.20x = 535,301.34 × 215,820.36
  4. Step 4: Simplify right side
    387,904.20x = 115,528,927,907.28
  5. Step 5: Solve for x
    x = 115,528,927,907.28/387,904.20
  6. Step 6: Final answer
    x = 297,828.50

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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.