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Finding the Fourth Proportional to 630,845.55, 870,555.67 and 358,907.59

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Solution

The fourth proportional to 630,845.55, 870,555.67 and 358,907.59 is: 495,286.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,845.55 : 870,555.67 = 358,907.59 : x
  2. Step 2: Convert to fraction form
    630,845.55/870,555.67 = 358,907.59/x
  3. Step 3: Cross multiply
    630,845.55x = 870,555.67 × 358,907.59
  4. Step 4: Simplify right side
    630,845.55x = 312,449,037,671.46
  5. Step 5: Solve for x
    x = 312,449,037,671.46/630,845.55
  6. Step 6: Final answer
    x = 495,286.11

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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.