Home / 507,819.60-761,729.40-128,739.60

Finding the Fourth Proportional to 507,819.60, 761,729.40 and 128,739.60

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Solution

The fourth proportional to 507,819.60, 761,729.40 and 128,739.60 is: 193,109.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,819.60 : 761,729.40 = 128,739.60 : x
  2. Step 2: Convert to fraction form
    507,819.60/761,729.40 = 128,739.60/x
  3. Step 3: Cross multiply
    507,819.60x = 761,729.40 × 128,739.60
  4. Step 4: Simplify right side
    507,819.60x = 98,064,738,264.24
  5. Step 5: Solve for x
    x = 98,064,738,264.24/507,819.60
  6. Step 6: Final answer
    x = 193,109.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.