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Finding the Fourth Proportional to 927,978.04, 1,280,699.58 and 520,149.16

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Solution

The fourth proportional to 927,978.04, 1,280,699.58 and 520,149.16 is: 717,856.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    927,978.04 : 1,280,699.58 = 520,149.16 : x
  2. Step 2: Convert to fraction form
    927,978.04/1,280,699.58 = 520,149.16/x
  3. Step 3: Cross multiply
    927,978.04x = 1,280,699.58 × 520,149.16
  4. Step 4: Simplify right side
    927,978.04x = 666,154,810,749.35
  5. Step 5: Solve for x
    x = 666,154,810,749.35/927,978.04
  6. Step 6: Final answer
    x = 717,856.22

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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.