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Finding the Fourth Proportional to 630,870.81, 870,603.03 and 344,395.68

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Solution

The fourth proportional to 630,870.81, 870,603.03 and 344,395.68 is: 475,266.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,870.81 : 870,603.03 = 344,395.68 : x
  2. Step 2: Convert to fraction form
    630,870.81/870,603.03 = 344,395.68/x
  3. Step 3: Cross multiply
    630,870.81x = 870,603.03 × 344,395.68
  4. Step 4: Simplify right side
    630,870.81x = 299,831,922,526.91
  5. Step 5: Solve for x
    x = 299,831,922,526.91/630,870.81
  6. Step 6: Final answer
    x = 475,266.75

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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.