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Finding the Fourth Proportional to 521,307.36, 719,236.87 and 291,830.85

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Solution

The fourth proportional to 521,307.36, 719,236.87 and 291,830.85 is: 402,632.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,307.36 : 719,236.87 = 291,830.85 : x
  2. Step 2: Convert to fraction form
    521,307.36/719,236.87 = 291,830.85/x
  3. Step 3: Cross multiply
    521,307.36x = 719,236.87 × 291,830.85
  4. Step 4: Simplify right side
    521,307.36x = 209,895,506,393.86
  5. Step 5: Solve for x
    x = 209,895,506,393.86/521,307.36
  6. Step 6: Final answer
    x = 402,632.92

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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.