Home / 921,220.51-1,271,378.89-553,816.58

Finding the Fourth Proportional to 921,220.51, 1,271,378.89 and 553,816.58

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Solution

The fourth proportional to 921,220.51, 1,271,378.89 and 553,816.58 is: 764,323.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,220.51 : 1,271,378.89 = 553,816.58 : x
  2. Step 2: Convert to fraction form
    921,220.51/1,271,378.89 = 553,816.58/x
  3. Step 3: Cross multiply
    921,220.51x = 1,271,378.89 × 553,816.58
  4. Step 4: Simplify right side
    921,220.51x = 704,110,708,744.00
  5. Step 5: Solve for x
    x = 704,110,708,744.00/921,220.51
  6. Step 6: Final answer
    x = 764,323.74

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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.