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Finding the Fourth Proportional to 693,312.16, 956,769.36 and 391,506.40

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Solution

The fourth proportional to 693,312.16, 956,769.36 and 391,506.40 is: 540,278.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,312.16 : 956,769.36 = 391,506.40 : x
  2. Step 2: Convert to fraction form
    693,312.16/956,769.36 = 391,506.40/x
  3. Step 3: Cross multiply
    693,312.16x = 956,769.36 × 391,506.40
  4. Step 4: Simplify right side
    693,312.16x = 374,581,327,763.90
  5. Step 5: Solve for x
    x = 374,581,327,763.90/693,312.16
  6. Step 6: Final answer
    x = 540,278.03

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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.