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Finding the Fourth Proportional to 719,312.25, 992,650.91 and 401,360.25

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Solution

The fourth proportional to 719,312.25, 992,650.91 and 401,360.25 is: 553,877.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,312.25 : 992,650.91 = 401,360.25 : x
  2. Step 2: Convert to fraction form
    719,312.25/992,650.91 = 401,360.25/x
  3. Step 3: Cross multiply
    719,312.25x = 992,650.91 × 401,360.25
  4. Step 4: Simplify right side
    719,312.25x = 398,410,615,393.53
  5. Step 5: Solve for x
    x = 398,410,615,393.53/719,312.25
  6. Step 6: Final answer
    x = 553,877.15

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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.