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Finding the Fourth Proportional to 647,547.70, 971,321.55 and 619,554.10

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Solution

The fourth proportional to 647,547.70, 971,321.55 and 619,554.10 is: 929,331.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,547.70 : 971,321.55 = 619,554.10 : x
  2. Step 2: Convert to fraction form
    647,547.70/971,321.55 = 619,554.10/x
  3. Step 3: Cross multiply
    647,547.70x = 971,321.55 × 619,554.10
  4. Step 4: Simplify right side
    647,547.70x = 601,786,248,720.86
  5. Step 5: Solve for x
    x = 601,786,248,720.86/647,547.70
  6. Step 6: Final answer
    x = 929,331.15

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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.