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Finding the Fourth Proportional to 630,624.68, 870,280.40 and 344,163.20

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Solution

The fourth proportional to 630,624.68, 870,280.40 and 344,163.20 is: 474,955.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,624.68 : 870,280.40 = 344,163.20 : x
  2. Step 2: Convert to fraction form
    630,624.68/870,280.40 = 344,163.20/x
  3. Step 3: Cross multiply
    630,624.68x = 870,280.40 × 344,163.20
  4. Step 4: Simplify right side
    630,624.68x = 299,518,487,361.28
  5. Step 5: Solve for x
    x = 299,518,487,361.28/630,624.68
  6. Step 6: Final answer
    x = 474,955.23

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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.