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Finding the Fourth Proportional to 545,038.13, 751,373.10 and 383,391.47

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Solution

The fourth proportional to 545,038.13, 751,373.10 and 383,391.47 is: 528,531.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,038.13 : 751,373.10 = 383,391.47 : x
  2. Step 2: Convert to fraction form
    545,038.13/751,373.10 = 383,391.47/x
  3. Step 3: Cross multiply
    545,038.13x = 751,373.10 × 383,391.47
  4. Step 4: Simplify right side
    545,038.13x = 288,070,033,570.59
  5. Step 5: Solve for x
    x = 288,070,033,570.59/545,038.13
  6. Step 6: Final answer
    x = 528,531.90

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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.