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Finding the Fourth Proportional to 620,637.80, 930,956.70 and 578,647.40

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Solution

The fourth proportional to 620,637.80, 930,956.70 and 578,647.40 is: 867,971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,637.80 : 930,956.70 = 578,647.40 : x
  2. Step 2: Convert to fraction form
    620,637.80/930,956.70 = 578,647.40/x
  3. Step 3: Cross multiply
    620,637.80x = 930,956.70 × 578,647.40
  4. Step 4: Simplify right side
    620,637.80x = 538,695,673,967.58
  5. Step 5: Solve for x
    x = 538,695,673,967.58/620,637.80
  6. Step 6: Final answer
    x = 867,971.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.