Home / 1,078,128.80-1,616,901.60-319,968.80

Finding the Fourth Proportional to 1,078,128.80, 1,616,901.60 and 319,968.80

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Solution

The fourth proportional to 1,078,128.80, 1,616,901.60 and 319,968.80 is: 479,866.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,128.80 : 1,616,901.60 = 319,968.80 : x
  2. Step 2: Convert to fraction form
    1,078,128.80/1,616,901.60 = 319,968.80/x
  3. Step 3: Cross multiply
    1,078,128.80x = 1,616,901.60 × 319,968.80
  4. Step 4: Simplify right side
    1,078,128.80x = 517,358,064,670.08
  5. Step 5: Solve for x
    x = 517,358,064,670.08/1,078,128.80
  6. Step 6: Final answer
    x = 479,866.66

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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.