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Finding the Fourth Proportional to 676,547.92, 933,408.68 and 390,061.76

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Solution

The fourth proportional to 676,547.92, 933,408.68 and 390,061.76 is: 538,154.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,547.92 : 933,408.68 = 390,061.76 : x
  2. Step 2: Convert to fraction form
    676,547.92/933,408.68 = 390,061.76/x
  3. Step 3: Cross multiply
    676,547.92x = 933,408.68 × 390,061.76
  4. Step 4: Simplify right side
    676,547.92x = 364,087,032,520.08
  5. Step 5: Solve for x
    x = 364,087,032,520.08/676,547.92
  6. Step 6: Final answer
    x = 538,154.09

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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.