Home / 487,358.09-672,284.06-283,386.55

Finding the Fourth Proportional to 487,358.09, 672,284.06 and 283,386.55

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Solution

The fourth proportional to 487,358.09, 672,284.06 and 283,386.55 is: 390,916.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,358.09 : 672,284.06 = 283,386.55 : x
  2. Step 2: Convert to fraction form
    487,358.09/672,284.06 = 283,386.55/x
  3. Step 3: Cross multiply
    487,358.09x = 672,284.06 × 283,386.55
  4. Step 4: Simplify right side
    487,358.09x = 190,516,258,348.45
  5. Step 5: Solve for x
    x = 190,516,258,348.45/487,358.09
  6. Step 6: Final answer
    x = 390,916.37

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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.