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Finding the Fourth Proportional to 612,640.40, 917,648.40 and 507,664.40

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Solution

The fourth proportional to 612,640.40, 917,648.40 and 507,664.40 is: 760,409.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,640.40 : 917,648.40 = 507,664.40 : x
  2. Step 2: Convert to fraction form
    612,640.40/917,648.40 = 507,664.40/x
  3. Step 3: Cross multiply
    612,640.40x = 917,648.40 × 507,664.40
  4. Step 4: Simplify right side
    612,640.40x = 465,857,424,396.96
  5. Step 5: Solve for x
    x = 465,857,424,396.96/612,640.40
  6. Step 6: Final answer
    x = 760,409.25

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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.