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Finding the Fourth Proportional to 569,806.20, 786,353.10 and 315,159.20

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Solution

The fourth proportional to 569,806.20, 786,353.10 and 315,159.20 is: 434,931.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    569,806.20 : 786,353.10 = 315,159.20 : x
  2. Step 2: Convert to fraction form
    569,806.20/786,353.10 = 315,159.20/x
  3. Step 3: Cross multiply
    569,806.20x = 786,353.10 × 315,159.20
  4. Step 4: Simplify right side
    569,806.20x = 247,826,413,913.52
  5. Step 5: Solve for x
    x = 247,826,413,913.52/569,806.20
  6. Step 6: Final answer
    x = 434,931.06

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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.