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Finding the Fourth Proportional to 719,683.96, 992,805.15 and 429,090.58

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Solution

The fourth proportional to 719,683.96, 992,805.15 and 429,090.58 is: 591,931.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,683.96 : 992,805.15 = 429,090.58 : x
  2. Step 2: Convert to fraction form
    719,683.96/992,805.15 = 429,090.58/x
  3. Step 3: Cross multiply
    719,683.96x = 992,805.15 × 429,090.58
  4. Step 4: Simplify right side
    719,683.96x = 426,003,337,640.49
  5. Step 5: Solve for x
    x = 426,003,337,640.49/719,683.96
  6. Step 6: Final answer
    x = 591,931.13

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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.