Home / 877,545.61-1,211,133.20-505,000.86

Finding the Fourth Proportional to 877,545.61, 1,211,133.20 and 505,000.86

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Solution

The fourth proportional to 877,545.61, 1,211,133.20 and 505,000.86 is: 696,970.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,545.61 : 1,211,133.20 = 505,000.86 : x
  2. Step 2: Convert to fraction form
    877,545.61/1,211,133.20 = 505,000.86/x
  3. Step 3: Cross multiply
    877,545.61x = 1,211,133.20 × 505,000.86
  4. Step 4: Simplify right side
    877,545.61x = 611,623,308,837.05
  5. Step 5: Solve for x
    x = 611,623,308,837.05/877,545.61
  6. Step 6: Final answer
    x = 696,970.40

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Double scale
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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.