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Finding the Fourth Proportional to 577,185.40, 865,778.10 and 470,897.20

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Solution

The fourth proportional to 577,185.40, 865,778.10 and 470,897.20 is: 706,345.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,185.40 : 865,778.10 = 470,897.20 : x
  2. Step 2: Convert to fraction form
    577,185.40/865,778.10 = 470,897.20/x
  3. Step 3: Cross multiply
    577,185.40x = 865,778.10 × 470,897.20
  4. Step 4: Simplify right side
    577,185.40x = 407,692,483,111.32
  5. Step 5: Solve for x
    x = 407,692,483,111.32/577,185.40
  6. Step 6: Final answer
    x = 706,345.80

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Double scale
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Similar ratio
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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.