Home / 676,929.29-934,255.69-390,443.09

Finding the Fourth Proportional to 676,929.29, 934,255.69 and 390,443.09

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Solution

The fourth proportional to 676,929.29, 934,255.69 and 390,443.09 is: 538,865.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,929.29 : 934,255.69 = 390,443.09 : x
  2. Step 2: Convert to fraction form
    676,929.29/934,255.69 = 390,443.09/x
  3. Step 3: Cross multiply
    676,929.29x = 934,255.69 × 390,443.09
  4. Step 4: Simplify right side
    676,929.29x = 364,773,672,806.30
  5. Step 5: Solve for x
    x = 364,773,672,806.30/676,929.29
  6. Step 6: Final answer
    x = 538,865.26

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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.