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Finding the Fourth Proportional to 616,812.80, 926,774.40 and 392,280.80

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Solution

The fourth proportional to 616,812.80, 926,774.40 and 392,280.80 is: 589,410.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,812.80 : 926,774.40 = 392,280.80 : x
  2. Step 2: Convert to fraction form
    616,812.80/926,774.40 = 392,280.80/x
  3. Step 3: Cross multiply
    616,812.80x = 926,774.40 × 392,280.80
  4. Step 4: Simplify right side
    616,812.80x = 363,555,803,051.52
  5. Step 5: Solve for x
    x = 363,555,803,051.52/616,812.80
  6. Step 6: Final answer
    x = 589,410.28

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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.