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Finding the Fourth Proportional to 676,514.92, 933,363.12 and 390,028.72

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Solution

The fourth proportional to 676,514.92, 933,363.12 and 390,028.72 is: 538,108.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,514.92 : 933,363.12 = 390,028.72 : x
  2. Step 2: Convert to fraction form
    676,514.92/933,363.12 = 390,028.72/x
  3. Step 3: Cross multiply
    676,514.92x = 933,363.12 × 390,028.72
  4. Step 4: Simplify right side
    676,514.92x = 364,038,422,988.81
  5. Step 5: Solve for x
    x = 364,038,422,988.81/676,514.92
  6. Step 6: Final answer
    x = 538,108.49

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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.