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Finding the Fourth Proportional to 528,055.10, 728,714.58 and 286,336.93

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Solution

The fourth proportional to 528,055.10, 728,714.58 and 286,336.93 is: 395,144.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,055.10 : 728,714.58 = 286,336.93 : x
  2. Step 2: Convert to fraction form
    528,055.10/728,714.58 = 286,336.93/x
  3. Step 3: Cross multiply
    528,055.10x = 728,714.58 × 286,336.93
  4. Step 4: Simplify right side
    528,055.10x = 208,657,895,683.44
  5. Step 5: Solve for x
    x = 208,657,895,683.44/528,055.10
  6. Step 6: Final answer
    x = 395,144.17

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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.