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Finding the Fourth Proportional to 525,861.26, 726,038.88 and 311,070.32

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Solution

The fourth proportional to 525,861.26, 726,038.88 and 311,070.32 is: 429,484.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,861.26 : 726,038.88 = 311,070.32 : x
  2. Step 2: Convert to fraction form
    525,861.26/726,038.88 = 311,070.32/x
  3. Step 3: Cross multiply
    525,861.26x = 726,038.88 × 311,070.32
  4. Step 4: Simplify right side
    525,861.26x = 225,849,146,734.04
  5. Step 5: Solve for x
    x = 225,849,146,734.04/525,861.26
  6. Step 6: Final answer
    x = 429,484.28

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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.