Home / 710,399.20-1,064,216.40-429,080.80

Finding the Fourth Proportional to 710,399.20, 1,064,216.40 and 429,080.80

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Solution

The fourth proportional to 710,399.20, 1,064,216.40 and 429,080.80 is: 642,786.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,399.20 : 1,064,216.40 = 429,080.80 : x
  2. Step 2: Convert to fraction form
    710,399.20/1,064,216.40 = 429,080.80/x
  3. Step 3: Cross multiply
    710,399.20x = 1,064,216.40 × 429,080.80
  4. Step 4: Simplify right side
    710,399.20x = 456,634,824,285.12
  5. Step 5: Solve for x
    x = 456,634,824,285.12/710,399.20
  6. Step 6: Final answer
    x = 642,786.23

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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.