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Finding the Fourth Proportional to 630,343.70, 869,915.46 and 358,436.92

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Solution

The fourth proportional to 630,343.70, 869,915.46 and 358,436.92 is: 494,666.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,343.70 : 869,915.46 = 358,436.92 : x
  2. Step 2: Convert to fraction form
    630,343.70/869,915.46 = 358,436.92/x
  3. Step 3: Cross multiply
    630,343.70x = 869,915.46 × 358,436.92
  4. Step 4: Simplify right side
    630,343.70x = 311,809,818,142.78
  5. Step 5: Solve for x
    x = 311,809,818,142.78/630,343.70
  6. Step 6: Final answer
    x = 494,666.35

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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.