Home / 776,678.78-1,071,264.60-518,425.52

Finding the Fourth Proportional to 776,678.78, 1,071,264.60 and 518,425.52

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Solution

The fourth proportional to 776,678.78, 1,071,264.60 and 518,425.52 is: 715,058.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,678.78 : 1,071,264.60 = 518,425.52 : x
  2. Step 2: Convert to fraction form
    776,678.78/1,071,264.60 = 518,425.52/x
  3. Step 3: Cross multiply
    776,678.78x = 1,071,264.60 × 518,425.52
  4. Step 4: Simplify right side
    776,678.78x = 555,370,909,990.75
  5. Step 5: Solve for x
    x = 555,370,909,990.75/776,678.78
  6. Step 6: Final answer
    x = 715,058.69

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Double scale
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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.