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Finding the Fourth Proportional to 630,729.53, 870,506.42 and 401,047.38

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Solution

The fourth proportional to 630,729.53, 870,506.42 and 401,047.38 is: 553,508.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,729.53 : 870,506.42 = 401,047.38 : x
  2. Step 2: Convert to fraction form
    630,729.53/870,506.42 = 401,047.38/x
  3. Step 3: Cross multiply
    630,729.53x = 870,506.42 × 401,047.38
  4. Step 4: Simplify right side
    630,729.53x = 349,114,319,014.18
  5. Step 5: Solve for x
    x = 349,114,319,014.18/630,729.53
  6. Step 6: Final answer
    x = 553,508.76

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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.