Home / 921,132-1,271,162.16-539,140.32

Finding the Fourth Proportional to 921,132, 1,271,162.16 and 539,140.32

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Solution

The fourth proportional to 921,132, 1,271,162.16 and 539,140.32 is: 744,013.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,132 : 1,271,162.16 = 539,140.32 : x
  2. Step 2: Convert to fraction form
    921,132/1,271,162.16 = 539,140.32/x
  3. Step 3: Cross multiply
    921,132x = 1,271,162.16 × 539,140.32
  4. Step 4: Simplify right side
    921,132x = 685,334,773,714.29
  5. Step 5: Solve for x
    x = 685,334,773,714.29/921,132
  6. Step 6: Final answer
    x = 744,013.64

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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.