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Finding the Fourth Proportional to 487,313.25, 672,222.28 and 283,341.63

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Solution

The fourth proportional to 487,313.25, 672,222.28 and 283,341.63 is: 390,854.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,313.25 : 672,222.28 = 283,341.63 : x
  2. Step 2: Convert to fraction form
    487,313.25/672,222.28 = 283,341.63/x
  3. Step 3: Cross multiply
    487,313.25x = 672,222.28 × 283,341.63
  4. Step 4: Simplify right side
    487,313.25x = 190,468,556,537.52
  5. Step 5: Solve for x
    x = 190,468,556,537.52/487,313.25
  6. Step 6: Final answer
    x = 390,854.46

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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.